diff --git a/tamper/between.py b/tamper/between.py
index 89c97f902..2f7869da7 100644
--- a/tamper/between.py
+++ b/tamper/between.py
@@ -11,39 +11,39 @@ from lib.core.enums import PRIORITY
 
 __priority__ = PRIORITY.HIGHEST
 
-def tamper(value):
+def tamper(payload):
     """
     Replaces '>' with 'NOT BETWEEN 0 AND #'
     Example: 'A > B' becomes 'A NOT BETWEEN 0 AND B'
     """
 
-    retVal = value
+    retVal = payload
 
-    if value:
+    if payload:
         retVal = ""
         quote, doublequote, firstspace = False, False, False
 
-        for i in xrange(len(value)):
+        for i in xrange(len(payload)):
             if not firstspace:
-                if value[i].isspace():
+                if payload[i].isspace():
                     firstspace = True
                     retVal += " "
                     continue
 
-            elif value[i] == '\'':
+            elif payload[i] == '\'':
                 quote = not quote
 
-            elif value[i] == '"':
+            elif payload[i] == '"':
                 doublequote = not doublequote
 
-            elif value[i] == ">" and not doublequote and not quote:
-                retVal += " " if i > 0 and not value[i-1].isspace() else ""
+            elif payload[i] == ">" and not doublequote and not quote:
+                retVal += " " if i > 0 and not payload[i-1].isspace() else ""
                 retVal += "NOT BETWEEN 0 AND"
-                retVal += " " if i < len(value) - 1 and not value[i+1].isspace() else ""
+                retVal += " " if i < len(payload) - 1 and not payload[i+1].isspace() else ""
 
                 continue
 
-            retVal += value[i]
+            retVal += payload[i]
 
     return retVal
 
diff --git a/tamper/charencode.py b/tamper/charencode.py
index ebf449fc1..751abefdc 100644
--- a/tamper/charencode.py
+++ b/tamper/charencode.py
@@ -14,24 +14,24 @@ from lib.core.exception import sqlmapUnsupportedFeatureException
 
 __priority__ = PRIORITY.LOWEST
 
-def tamper(value):
+def tamper(payload):
     """
-    Urlencodes all characters in a given value (not processing already encoded)
+    Urlencodes all characters in a given payload (not processing already encoded)
     Example: 'SELECT FIELD FROM%20TABLE' becomes '%53%45%4c%45%43%54%20%46%49%45%4c%44%20%46%52%4f%4d%20%54%41%42%4c%45'
     """
 
-    retVal = value
+    retVal = payload
 
-    if value:
+    if payload:
         retVal = ""
         i = 0
 
-        while i < len(value):
-            if value[i] == '%' and (i < len(value) - 2) and value[i+1] in string.hexdigits and value[i+2] in string.hexdigits:
-                retVal += value[i:i+3]
+        while i < len(payload):
+            if payload[i] == '%' and (i < len(payload) - 2) and payload[i+1] in string.hexdigits and payload[i+2] in string.hexdigits:
+                retVal += payload[i:i+3]
                 i += 3
             else:
-                retVal += '%%%X' % ord(value[i])
+                retVal += '%%%X' % ord(payload[i])
                 i += 1
 
     return retVal
diff --git a/tamper/charunicodeencode.py b/tamper/charunicodeencode.py
index 5c1d19662..42726178a 100644
--- a/tamper/charunicodeencode.py
+++ b/tamper/charunicodeencode.py
@@ -14,24 +14,24 @@ from lib.core.exception import sqlmapUnsupportedFeatureException
 
 __priority__ = PRIORITY.LOWEST
 
-def tamper(value):
+def tamper(payload):
     """
-    Replaces value with unicode-urlencode of non-encoded chars in value (not processing already encoded)
+    Replaces payload with unicode-urlencode of non-encoded chars in payload (not processing already encoded)
     Example: 'SELECT FIELD%20FROM TABLE' becomes '%u0053%u0045%u004c%u0045%u0043%u0054%u0020%u0046%u0049%u0045%u004c%u0044%u0020%u0046%u0052%u004f%u004d%u0020%u0054%u0041%u0042%u004c%u0045'
     """
 
-    retVal = value
+    retVal = payload
 
-    if value:
+    if payload:
         retVal = ""
         i = 0
 
-        while i < len(value):
-            if value[i] == '%' and (i < len(value) - 2) and value[i+1] in string.hexdigits and value[i+2] in string.hexdigits:
-                retVal += "%%u00%s" % value[i+1:i+3]
+        while i < len(payload):
+            if payload[i] == '%' and (i < len(payload) - 2) and payload[i+1] in string.hexdigits and payload[i+2] in string.hexdigits:
+                retVal += "%%u00%s" % payload[i+1:i+3]
                 i += 3
             else:
-                retVal += '%%u00%X' % ord(value[i])
+                retVal += '%%u00%X' % ord(payload[i])
                 i += 1
 
     return retVal
diff --git a/tamper/ifnull2ifisnull.py b/tamper/ifnull2ifisnull.py
index 0d549a4e9..79bae2a2c 100644
--- a/tamper/ifnull2ifisnull.py
+++ b/tamper/ifnull2ifisnull.py
@@ -11,39 +11,39 @@ from lib.core.enums import PRIORITY
 
 __priority__ = PRIORITY.HIGHEST
 
-def tamper(value):
+def tamper(payload):
     """
     Replaces 'IFNULL(A, B)' with 'IF(ISNULL(A), B, A)'
     Example: 'IFNULL(1, 2)' becomes 'IF(ISNULL(1), 2, 1)'
     """
 
-    if value and value.find("IFNULL") > -1:
+    if payload and payload.find("IFNULL") > -1:
 
-        while value.find("IFNULL(") > -1:
-            index = value.find("IFNULL(")
+        while payload.find("IFNULL(") > -1:
+            index = payload.find("IFNULL(")
             deepness = 1
             comma, end = None, None
 
-            for i in xrange(index + len("IFNULL("), len(value)):
-                if deepness == 1 and value[i] == ',':
+            for i in xrange(index + len("IFNULL("), len(payload)):
+                if deepness == 1 and payload[i] == ',':
                     comma = i
 
-                elif deepness == 1 and value[i] == ')':
+                elif deepness == 1 and payload[i] == ')':
                     end = i
                     break
 
-                elif value[i] == '(':
+                elif payload[i] == '(':
                     deepness += 1
 
-                elif value[i] == ')':
+                elif payload[i] == ')':
                     deepness -= 1
 
             if comma and end:
-                A = value[index + len("IFNULL("):comma]
-                B = value[comma + 1:end]
+                A = payload[index + len("IFNULL("):comma]
+                B = payload[comma + 1:end]
                 newVal = "IF(ISNULL(%s),%s,%s)" % (A, B, A)
-                value = value[:index] + newVal + value[end+1:]
+                payload = payload[:index] + newVal + payload[end+1:]
             else:
                 break
 
-    return value
+    return payload
diff --git a/tamper/randomcase.py b/tamper/randomcase.py
index cca53a6c7..6f2a33413 100644
--- a/tamper/randomcase.py
+++ b/tamper/randomcase.py
@@ -15,15 +15,15 @@ from lib.core.enums import PRIORITY
 
 __priority__ = PRIORITY.NORMAL
 
-def tamper(value):
+def tamper(payload):
     """
     Replaces each character with random case value
     Example: 'INSERT' might become 'InsERt'
     """
 
-    retVal = value
+    retVal = payload
 
-    if value:
+    if payload:
         for match in re.finditer(r"[A-Za-z_]+", retVal):
             word = match.group()
 
diff --git a/tamper/randomcomments.py b/tamper/randomcomments.py
index 7c8cf3d46..ffd4aa8c3 100644
--- a/tamper/randomcomments.py
+++ b/tamper/randomcomments.py
@@ -15,16 +15,16 @@ from lib.core.enums import PRIORITY
 
 __priority__ = PRIORITY.LOW
 
-def tamper(value):
+def tamper(payload):
     """
-    Add random comments to SQL keywords in value
+    Add random comments to SQL keywords
     Example: 'INSERT' becomes 'IN/**/S/**/ERT'
     """
 
-    retVal = value
+    retVal = payload
 
-    if value:
-        for match in re.finditer(r"[A-Za-z_]+", retVal):
+    if payload:
+        for match in re.finditer(r"[A-Za-z_]+", payload):
             word = match.group()
 
             if len(word) < 2:
diff --git a/tamper/space2comment.py b/tamper/space2comment.py
index a6cd85ca4..19a373875 100644
--- a/tamper/space2comment.py
+++ b/tamper/space2comment.py
@@ -11,36 +11,36 @@ from lib.core.enums import PRIORITY
 
 __priority__ = PRIORITY.LOW
 
-def tamper(value):
+def tamper(payload):
     """
     Replaces ' ' with '/**/'
     Example: 'SELECT id FROM users' becomes 'SELECT/**/id/**/FROM/**/users'
     """
 
-    retVal = value
+    retVal = payload
 
-    if value:
+    if payload:
         retVal = ""
         quote, doublequote, firstspace = False, False, False
 
-        for i in xrange(len(value)):
+        for i in xrange(len(payload)):
             if not firstspace:
-                if value[i].isspace():
+                if payload[i].isspace():
                     firstspace = True
                     retVal += "/**/"
                     continue
 
-            elif value[i] == '\'':
+            elif payload[i] == '\'':
                 quote = not quote
 
-            elif value[i] == '"':
+            elif payload[i] == '"':
                 doublequote = not doublequote
 
-            elif value[i]==" " and not doublequote and not quote:
+            elif payload[i]==" " and not doublequote and not quote:
                 retVal += "/**/"
                 continue
 
-            retVal += value[i]
+            retVal += payload[i]
 
     return retVal
 
diff --git a/tamper/space2plus.py b/tamper/space2plus.py
index f25bf8bd2..209c16560 100644
--- a/tamper/space2plus.py
+++ b/tamper/space2plus.py
@@ -11,36 +11,35 @@ from lib.core.enums import PRIORITY
 
 __priority__ = PRIORITY.LOW
 
-def tamper(value):
+def tamper(payload):
     """
     Replaces ' ' with '+'
     Example: 'SELECT id FROM users' becomes 'SELECT+id+FROM+users'
     """
 
-    retVal = value
+    retVal = payload
 
-    if value:
+    if payload:
         retVal = ""
         quote, doublequote, firstspace = False, False, False
 
-        for i in xrange(len(value)):
+        for i in xrange(len(payload)):
             if not firstspace:
-                if value[i].isspace():
+                if payload[i].isspace():
                     firstspace = True
                     retVal += "+"
                     continue
 
-            elif value[i] == '\'':
+            elif payload[i] == '\'':
                 quote = not quote
 
-            elif value[i] == '"':
+            elif payload[i] == '"':
                 doublequote = not doublequote
 
-            elif value[i]==" " and not doublequote and not quote:
+            elif payload[i]==" " and not doublequote and not quote:
                 retVal += "+"
                 continue
 
-            retVal += value[i]
+            retVal += payload[i]
 
     return retVal
-
diff --git a/tamper/space2randomblank.py b/tamper/space2randomblank.py
index a41b664cb..22ab71a8d 100644
--- a/tamper/space2randomblank.py
+++ b/tamper/space2randomblank.py
@@ -13,37 +13,37 @@ from lib.core.enums import PRIORITY
 
 __priority__ = PRIORITY.LOW
 
-def tamper(value):
+def tamper(payload):
     """
     Replaces ' ' with a random blank char from a set ('\r', '\n', '\t')
     Example: 'SELECT id FROM users' becomes 'SELECT\rid\tFROM\nusers'
     """
 
     blanks = ['\r', '\n', '\t']
-    retVal = value
+    retVal = payload
 
-    if value:
+    if payload:
         retVal = ""
         quote, doublequote, firstspace = False, False, False
 
-        for i in xrange(len(value)):
+        for i in xrange(len(payload)):
             if not firstspace:
-                if value[i].isspace():
+                if payload[i].isspace():
                     firstspace = True
                     retVal += random.choice(blanks)
                     continue
 
-            elif value[i] == '\'':
+            elif payload[i] == '\'':
                 quote = not quote
 
-            elif value[i] == '"':
+            elif payload[i] == '"':
                 doublequote = not doublequote
 
-            elif value[i]==" " and not doublequote and not quote:
+            elif payload[i]==" " and not doublequote and not quote:
                 retVal += random.choice(blanks)
                 continue
 
-            retVal += value[i]
+            retVal += payload[i]
 
     return retVal