diff --git a/src/task.c b/src/task.c
index 0ed2a48a..1ba3f20c 100644
--- a/src/task.c
+++ b/src/task.c
@@ -1331,7 +1331,9 @@ static void _tf_task_gc_timer(uv_timer_t* timer)
 	tf_trace_begin(task->_trace, "JS_RunGC");
 	JS_RunGC(task->_runtime);
 	tf_trace_end(task->_trace);
+#ifdef M_TRIM_THRESHOLD
 	malloc_trim(0);
+#endif
 }
 
 static void _tf_task_trace_timer(uv_timer_t* timer)