diff --git a/core-foundation/src/runloop.rs b/core-foundation/src/runloop.rs
index 5655535..ccc1f78 100644
--- a/core-foundation/src/runloop.rs
+++ b/core-foundation/src/runloop.rs
@@ -125,8 +125,9 @@ mod test {
 
 
         let run_loop_timer = CFRunLoopTimer::new(now + 0.20f64, 0f64, 0, 0, timer_popped, &mut context);
-        run_loop.add_timer(&run_loop_timer, kCFRunLoopDefaultMode);
-
+        unsafe {
+            run_loop.add_timer(&run_loop_timer, kCFRunLoopDefaultMode);
+        }
         CFRunLoop::run_current();
     }