diff --git a/tamper/charencode.py b/tamper/charencode.py
index cf522e820..f58830f93 100644
--- a/tamper/charencode.py
+++ b/tamper/charencode.py
@@ -8,7 +8,6 @@ from lib.core.exception import sqlmapUnsupportedFeatureException
 value -> urlencode of nonencoded chars in value
 """
 def tamper(place, value):
-    raise sqlmapUnsupportedFeatureException, "can't use tampering module 'charencode.py' with 'URI' type injections"
     retVal = value
     if value:
         if place != "URI":
@@ -22,5 +21,5 @@ def tamper(place, value):
                     retVal += '%%%X' % ord(value[i])
                     i += 1
         else:
-            raise sqlmapUnsupportedFeatureException, "can't use tampering module 'charencode.py' with 'URI' type injections"
+            raise sqlmapUnsupportedFeatureException, "can't use tampering module '%s' with 'URI' type injections" % __name__
     return retVal
diff --git a/tamper/doubleencode.py b/tamper/doubleencode.py
index 04597e6e8..6b88c5489 100644
--- a/tamper/doubleencode.py
+++ b/tamper/doubleencode.py
@@ -11,5 +11,5 @@ def tamper(place, value):
         if place != "URI":
             value = urlencode(value)
         else:
-            raise sqlmapUnsupportedFeatureException, "can't use tampering module 'doubleencode.py' with 'URI' type injections"
+            raise sqlmapUnsupportedFeatureException, "can't use tampering module '%s' with 'URI' type injections" % __name__
     return value