diff --git a/lib/techniques/blind/inference.py b/lib/techniques/blind/inference.py
index 9d6ac3550..38dd2e0d1 100644
--- a/lib/techniques/blind/inference.py
+++ b/lib/techniques/blind/inference.py
@@ -304,7 +304,7 @@ def bisection(payload, expression, length=None, charsetType=None, firstChar=None
                                 else:
                                     raise sqlmapValueException
 
-                            val = ' '
+                            val = ''
                     else:
                         break