diff --git a/lib/core/common.py b/lib/core/common.py
index c9e629361..c5e82c844 100644
--- a/lib/core/common.py
+++ b/lib/core/common.py
@@ -1991,7 +1991,7 @@ def findMultipartPostBoundary(post):
 
     return retVal
 
-def urldecode(value, encoding=None, unsafe="%%&=;%s" % CUSTOM_INJECTION_MARK_CHAR, convall=False):
+def urldecode(value, encoding=None, unsafe="%%&=;+%s" % CUSTOM_INJECTION_MARK_CHAR, convall=False):
     result = value
 
     if value: