diff --git a/util/fptr_wlist.c b/util/fptr_wlist.c
index 16de532c1..4f6404ad2 100644
--- a/util/fptr_wlist.c
+++ b/util/fptr_wlist.c
@@ -118,7 +118,9 @@ fptr_whitelist_event(void (*fptr)(int, short, void *))
 	else if(fptr == &comm_point_local_handle_callback) return 1;
 	else if(fptr == &comm_point_raw_handle_callback) return 1;
 	else if(fptr == &tube_handle_signal) return 1;
+#ifdef UB_ON_WINDOWS
 	else if(fptr == &worker_win_stop_cb) return 1;
+#endif
 	return 0;
 }