diff --git a/src/OpenMesh/Tools/Utils/Timer.cc b/src/OpenMesh/Tools/Utils/Timer.cc
index 37b85b05..afc67c1e 100644
--- a/src/OpenMesh/Tools/Utils/Timer.cc
+++ b/src/OpenMesh/Tools/Utils/Timer.cc
@@ -163,10 +163,10 @@ public:
     ~TimerImplPosix()
     { }
 
-    virtual void reset(void) { seconds_ = 0.0; }
+    virtual void reset(void) override { seconds_ = 0.0; }
 
-    virtual void start(void) { seconds_ = 0.0; clock_gettime( id_, &start_ ); }
-    virtual void stop(void)
+    virtual void start(void) override { seconds_ = 0.0; clock_gettime( id_, &start_ ); }
+    virtual void stop(void) override
     {
         timespec stop;
         clock_gettime( id_, &stop );
@@ -174,9 +174,9 @@ public:
         seconds_ += ( (double(stop.tv_nsec-start_.tv_nsec)*1e-9) );
     }
 
-    virtual void cont(void)  { clock_gettime( id_, &start_ ); }
+    virtual void cont(void) override { clock_gettime( id_, &start_ ); }
 
-    virtual double seconds() const { return seconds_; }
+    virtual double seconds() override const { return seconds_; }
 
 protected:
    clockid_t id_;