diff --git a/src/wlserver.cpp b/src/wlserver.cpp
index 8ae18b1..e846e7d 100644
--- a/src/wlserver.cpp
+++ b/src/wlserver.cpp
@@ -939,6 +939,11 @@ void wlserver_send_frame_done( struct wlr_surface *surf, const struct timespec *
 	wlr_surface_send_frame_done( surf, when );
 }
 
+bool wlserver_surface_is_async( struct wlr_surface *surf )
+{
+	return get_wl_surface_info( surf )->presentation_hint != 0;
+}
+
 void wlserver_touchmotion( double x, double y, int touch_id, uint32_t time )
 {
 	if ( wlserver.mouse_focus_surface != NULL )
diff --git a/src/wlserver.hpp b/src/wlserver.hpp
index 47d27ce..6002a61 100644
--- a/src/wlserver.hpp
+++ b/src/wlserver.hpp
@@ -158,6 +158,8 @@ void wlserver_touchup( int touch_id, uint32_t time );
 
 void wlserver_send_frame_done( struct wlr_surface *surf, const struct timespec *when );
 
+bool wlserver_surface_is_async( struct wlr_surface *surf );
+
 struct wlserver_output_info {
 	const char *name;
 	const char *description;