diff --git a/code/ryzom/client/src/fx_manager.h b/code/ryzom/client/src/fx_manager.h
index 9a9400d56..9bb05c947 100644
--- a/code/ryzom/client/src/fx_manager.h
+++ b/code/ryzom/client/src/fx_manager.h
@@ -96,7 +96,7 @@ protected:
 		float			TimeOut;
 	};
 
-	CHashMultiMap<sint64, CDeferredFX> _DeferredFXByDate;
+	CHashMultiMap<uint64, CDeferredFX> _DeferredFXByDate;
 };