diff --git a/lib/core/settings.py b/lib/core/settings.py
index 6013aa90f..677e06239 100644
--- a/lib/core/settings.py
+++ b/lib/core/settings.py
@@ -249,3 +249,6 @@ URI_INJECTION_MARK_CHAR = '*'
 
 # Maximum length used for retrieving data over MySQL error based payload due to "known" problems with longer result strings
 MYSQL_ERROR_TRIM_LENGTH = 100
+
+#
+EXCLUDE_UNESCAPE = ("WAITFOR DELAY ", " INTO DUMPFILE ")
diff --git a/lib/core/unescaper.py b/lib/core/unescaper.py
index a57a37954..d5d21decb 100644
--- a/lib/core/unescaper.py
+++ b/lib/core/unescaper.py
@@ -9,16 +9,20 @@ See the file 'doc/COPYING' for copying permission
 
 from lib.core.common import Backend
 from lib.core.datatype import advancedDict
+from lib.core.settings import EXCLUDE_UNESCAPE
 
 class Unescaper(advancedDict):
     def unescape(self, expression, quote=True, dbms=None):
+        if expression is None:
+            return expression
+
+        for exclude in EXCLUDE_UNESCAPE:
+            if exclude in expression:
+                return expression
+
         identifiedDbms = Backend.getIdentifiedDbms()
 
-        if not expression:
-            return expression
-        elif "WAITFOR DELAY " in expression:
-            return expression
-        elif dbms is not None:
+        if dbms is not None:
             return self[dbms](expression, quote=quote)
         elif identifiedDbms is not None:
             return self[identifiedDbms](expression, quote=quote)
diff --git a/lib/techniques/inband/union/use.py b/lib/techniques/inband/union/use.py
index 6f8245114..b00fae4ce 100644
--- a/lib/techniques/inband/union/use.py
+++ b/lib/techniques/inband/union/use.py
@@ -32,13 +32,12 @@ from lib.utils.resume import resume
 
 reqCount = 0
 
-def __oneShotUnionUse(expression, unpack=True, unescape=True):
+def __oneShotUnionUse(expression, unpack=True):
     global reqCount
 
     # Prepare expression with delimiters
-    if unescape:
-        expression = agent.concatQuery(expression, unpack)
-        expression = unescaper.unescape(expression)
+    expression = agent.concatQuery(expression, unpack)
+    expression = unescaper.unescape(expression)
 
     if conf.limitStart or conf.limitStop:
         where = PAYLOAD.WHERE.NEGATIVE
@@ -102,7 +101,7 @@ def configUnion(char=None, columns=None):
     elif isinstance(columns, basestring):
         __configUnionCols(columns)
 
-def unionUse(expression, unescape=True, unpack=True, dump=False):
+def unionUse(expression, unpack=True, dump=False):
     """
     This function tests for an inband SQL injection on the target
     url then call its subsidiary function to effectively perform an
@@ -204,7 +203,7 @@ def unionUse(expression, unescape=True, unpack=True, dump=False):
             count = parseUnionPage(count, countedExpression)
 
             if not count or not count.isdigit():
-                output = __oneShotUnionUse(countedExpression, unpack=unpack)
+                output = __oneShotUnionUse(countedExpression, unpack)
 
                 if output:
                     count = parseUnionPage(output, countedExpression)
@@ -239,7 +238,7 @@ def unionUse(expression, unescape=True, unpack=True, dump=False):
                     output = resume(limitedExpr, None)
 
                     if not output:
-                        output = __oneShotUnionUse(limitedExpr, unescape=unescape, unpack=unpack)
+                        output = __oneShotUnionUse(limitedExpr, unpack)
 
                     if output:
                         value += output
@@ -251,7 +250,7 @@ def unionUse(expression, unescape=True, unpack=True, dump=False):
                 logger.warn(warnMsg)
 
     if not value:
-        value = __oneShotUnionUse(expression, unescape=unescape, unpack=unpack)
+        value = __oneShotUnionUse(expression, unpack)
 
     duration = calculateDeltaSeconds(start)