diff --git a/lib/framework/debug.h b/lib/framework/debug.h
index dcabf8611..7e00d4c79 100644
--- a/lib/framework/debug.h
+++ b/lib/framework/debug.h
@@ -184,7 +184,7 @@ extern UDWORD traceID;
 #define objTrace(id, ...) do { if (id == traceID) _realObjTrace(id, __FUNCTION__, __VA_ARGS__); } while(0)
 void _realObjTrace(int id, const char *function, const char *str, ...) WZ_DECL_FORMAT(printf, 3, 4);
 static inline void objTraceEnable(UDWORD id) { traceID = id; }
-static inline void objTraceDisable(void) { traceID = -1; }
+static inline void objTraceDisable(void) { traceID = (UDWORD)-1; }
 
 #if defined(__cplusplus)
 }