diff --git a/lib/utils/hash.py b/lib/utils/hash.py
index 69994d23e..87ae8d411 100644
--- a/lib/utils/hash.py
+++ b/lib/utils/hash.py
@@ -668,8 +668,9 @@ def dictionaryAttack(attack_dict):
     hash_regexes = []
     results = []
     resumes = []
-    processException = False
     user_hash = []
+    processException = False
+    foundHash = False
 
     for (_, hashes) in attack_dict.items():
         for hash_ in hashes:
@@ -693,6 +694,7 @@ def dictionaryAttack(attack_dict):
                 if not hash_:
                     continue
 
+                foundHash = True
                 hash_ = hash_.split()[0] if hash_ and hash_.strip() else hash_
 
                 if re.match(hash_regex, hash_):
@@ -955,9 +957,8 @@ def dictionaryAttack(attack_dict):
 
     results.extend(resumes)
 
-    if len(hash_regexes) == 0:
-        warnMsg = "unknown hash format. "
-        warnMsg += "Please report by e-mail to 'dev@sqlmap.org'"
+    if foundHash and len(hash_regexes) == 0:
+        warnMsg = "unknown hash format"
         logger.warn(warnMsg)
 
     if len(results) == 0: