diff --git a/code/nel/include/nel/misc/mutex.h b/code/nel/include/nel/misc/mutex.h
index e93929ba9..e2205d666 100644
--- a/code/nel/include/nel/misc/mutex.h
+++ b/code/nel/include/nel/misc/mutex.h
@@ -198,10 +198,10 @@ test_again:
  * \author Nevrax France
  * \date 2002, 2003
  */
-#ifdef __ppc__
-// on ppc, use fait mutex because we don't have ppc implementation of fast mutex
-#   define CFastMutex CFairMutex
-#else
+#if defined(__ppc__) && !defined(NL_OS_MAC) && (GCC_VERSION <= 40100)
+#	error "no CFastMutex implementation available, try to use GCC >4.0.1"
+#endif
+
 
 #ifdef NL_OS_WINDOWS
 #pragma managed(push, off)
@@ -311,8 +311,6 @@ private:
 };
 
 
-#endif
-
 /**
  * Fast mutex for multiprocessor implementation (not fairly).
  * Used for multiprocessor critical section synchronisation.