diff --git a/lib/core/target.py b/lib/core/target.py
index 587ac2919..8aa837d07 100644
--- a/lib/core/target.py
+++ b/lib/core/target.py
@@ -136,6 +136,10 @@ def _setRequestParams():
                 conf.data = re.sub(r"(?si)(Content-Disposition.+?)((\r)?\n--)", r"\g<1>%s\g<2>" % CUSTOM_INJECTION_MARK_CHAR, conf.data)
                 kb.postHint = POST_HINT.MULTIPART
 
+        if kb.postHint:
+            if CUSTOM_INJECTION_MARK_CHAR not in conf.data:  # in case that no usable parameter values has been found
+                kb.postHint = None
+
         if not kb.postHint:
             if CUSTOM_INJECTION_MARK_CHAR in conf.data:  # later processed
                 pass