diff --git a/lib/techniques/union/test.py b/lib/techniques/union/test.py
index e32c06217..e23c04f86 100644
--- a/lib/techniques/union/test.py
+++ b/lib/techniques/union/test.py
@@ -53,7 +53,7 @@ def __findUnionCharCount(comment, place, parameter, value, prefix, suffix, where
             query = agent.suffixQuery(query, suffix=suffix, comment=comment)
             payload = agent.payload(newValue=query, place=place, parameter=parameter, where=where)
             page, headers = Request.queryPage(payload, place=place, content=True, raise404=False)
-            return not re.search(r"(warning|error|order by|failed)", page or "", re.I) and comparison(page, headers)
+            return not re.search(r"(warning|error|order by|failed)", page or "", re.I) and comparison(page, headers) or re.search(r"data types cannot be compared or sorted", page or "", re.I)
 
         if __orderByTest(1) and not __orderByTest(randomInt()):
             infoMsg = "ORDER BY technique seems to be usable. "