diff --git a/src/common/Timer.h b/src/common/Timer.h
index 1c14c574ba36c..6ac916d9e2ef4 100644
--- a/src/common/Timer.h
+++ b/src/common/Timer.h
@@ -27,10 +27,6 @@ class SafeTimerThread;
 
 class SafeTimer
 {
-  // This class isn't supposed to be copied
-  SafeTimer(const SafeTimer &rhs);
-  SafeTimer& operator=(const SafeTimer &rhs);
-
   CephContext *cct;
   Mutex& lock;
   Cond cond;
@@ -49,6 +45,10 @@ class SafeTimer
   void dump(const char *caller = 0) const;
 
 public:
+  // This class isn't supposed to be copied
+  SafeTimer(const SafeTimer&) = delete;
+  SafeTimer& operator=(const SafeTimer&) = delete;
+
   /* Safe callbacks determines whether callbacks are called with the lock
    * held.
    *