diff --git a/DQMServices/Core/interface/MonitorElement.h b/DQMServices/Core/interface/MonitorElement.h
old mode 100755
new mode 100644
index 0ad2eb3b57240..47c10a0b72b45
--- a/DQMServices/Core/interface/MonitorElement.h
+++ b/DQMServices/Core/interface/MonitorElement.h
@@ -93,7 +93,7 @@ class MonitorElement
   MonitorElement(const MonitorElement &);
   MonitorElement(MonitorElement &&);
   MonitorElement &operator=(const MonitorElement &) = delete;
-  MonitorElement &operator=(const MonitorElement &&) = delete;
+  MonitorElement &operator=(MonitorElement &&) = delete;
   ~MonitorElement(void);
 
   /// Compare monitor elements, for ordering in sets.
diff --git a/DQMServices/Core/src/MonitorElement.cc b/DQMServices/Core/src/MonitorElement.cc
old mode 100755
new mode 100644