1 files changed, 4 insertions, 0 deletions
diff --git a/sql/item_func.cc b/sql/item_func.cc
index a7c9a836fde..6e81b03d846 100644
--- a/sql/item_func.cc
+++ b/sql/item_func.cc
@@ -1326,6 +1326,10 @@ longlong Item_func_mod::int_op()
     signal_divide_by_null();
     return 0;
   }
+
+  if (args[0]->unsigned_flag)
+    return ((ulonglong) value) % val2;
+
   return value % val2;
 }