diff --git a/sql/sql_lifo_buffer.h b/sql/sql_lifo_buffer.h
index 34f9624436d..95fe02ecda7 100644
--- a/sql/sql_lifo_buffer.h
+++ b/sql/sql_lifo_buffer.h
@@ -67,7 +67,8 @@ public:
   {
     start= start_arg;
     end= end_arg;
-    TRASH(start, end - start);
+    if (end != start)
+      TRASH(start, end - start);
     reset();
   }