diff --git a/src/libCom/cxxTemplates/epicsGuard.h b/src/libCom/cxxTemplates/epicsGuard.h
index 3d39980be..21013f822 100644
--- a/src/libCom/cxxTemplates/epicsGuard.h
+++ b/src/libCom/cxxTemplates/epicsGuard.h
@@ -17,12 +17,12 @@ template < class T >
 class epicsGuard {
 public:
     epicsGuard ( T & );
+    epicsGuard ( const epicsGuard & ); 
     ~epicsGuard ();
 private:
     T & targetMutex;
-    friend class epicsGuardRelease < T >;
-    // epicsGuard ( const epicsGuard & ); visual c++ warning bug
     // epicsGuard & operator = ( const epicsGuard & ); visual c++ warning bug
+    friend class epicsGuardRelease < T >;
 };
 
 // Automatically releases and reapplies the mutex.
@@ -54,6 +54,13 @@ inline epicsGuard < T > :: epicsGuard ( T & mutexIn ) :
     this->targetMutex.lock ();
 }
 
+template < class T >
+epicsGuard < T > :: epicsGuard ( const epicsGuard & guardIn ) :
+    targetMutex ( guardIn.targetMutex )
+{
+    this->targetMutex.lock ();
+}
+
 template < class T >
 inline epicsGuard < T > :: ~epicsGuard ()
 {