diff --git a/lib/techniques/inband/union/test.py b/lib/techniques/inband/union/test.py
index 40f1a36bc..7f7118b3d 100644
--- a/lib/techniques/inband/union/test.py
+++ b/lib/techniques/inband/union/test.py
@@ -211,9 +211,10 @@ def __unionTestByCharBruteforce(comment, place, parameter, value, prefix, suffix
         validPayload, vector = __unionConfirm(comment, place, parameter, value, prefix, suffix, count)
 
         if not all([validPayload, vector]) and not conf.uChar:
-            warnMsg = "please consider usage of --union-char option "
-            warnMsg += "(e.g. --union-char=1) and/or try to force "
-            warnMsg += "back-end DBMS (e.g. --dbms=mysql) to make it work"
+            warnMsg = "please, consider to provide --union-char switch "
+            warnMsg += "(e.g. --union-char=1) and/or try to force the "
+            warnMsg += "back-end DBMS (e.g. --dbms=mysql) if UNION based "
+            warnMsg += "SQL injection is not detected"
             singleTimeWarnMessage(warnMsg)
 
     return validPayload, vector