diff --git a/lib/controller/controller.py b/lib/controller/controller.py
index c7984b97f..06f98fbc5 100644
--- a/lib/controller/controller.py
+++ b/lib/controller/controller.py
@@ -277,7 +277,7 @@ def start():
             testSqlInj = False
 
             if PLACE.GET in conf.parameters and not any([conf.data, conf.testParameter]):
-                for parameter in re.findall(r"([^=]+)=([^%s]+%s?|\Z)" % (re.escape(conf.paramDel) or DEFAULT_GET_POST_DELIMITER, re.escape(conf.paramDel) or DEFAULT_GET_POST_DELIMITER), conf.parameters[PLACE.GET]):
+                for parameter in re.findall(r"([^=]+)=([^%s]+%s?|\Z)" % (re.escape(conf.paramDel or "") or DEFAULT_GET_POST_DELIMITER, re.escape(conf.paramDel or "") or DEFAULT_GET_POST_DELIMITER), conf.parameters[PLACE.GET]):
                     paramKey = (conf.hostname, conf.path, PLACE.GET, parameter[0])
 
                     if paramKey not in kb.testedParams: