diff --git a/plugins/dbms/mysql/fingerprint.py b/plugins/dbms/mysql/fingerprint.py
index e72897a19..3f1c118fa 100644
--- a/plugins/dbms/mysql/fingerprint.py
+++ b/plugins/dbms/mysql/fingerprint.py
@@ -222,7 +222,7 @@ class Fingerprint(GenericFingerprint):
                 setDbms("%s 5" % DBMS.MYSQL)
                 self.getBanner()
 
-            elif inject.checkBooleanExpression("STRCMP(CHAR(97), CHAR(65))=0"):
+            elif inject.checkBooleanExpression("STRCMP(LOWER(CURRENT_USER()), UPPER(CURRENT_USER()))=0"):
                 kb.dbmsVersion = ["< 5.0.0"]
                 setDbms("%s 4" % DBMS.MYSQL)
                 self.getBanner()