diff --git a/wayland.c b/wayland.c
index f258618..e4a554c 100644
--- a/wayland.c
+++ b/wayland.c
@@ -157,10 +157,16 @@ void egl_init_surface(struct client_state *state, struct surface *surface) {
 
 static const struct wl_callback_listener wl_surface_frame_listener;
 
+bool first_frame_done = false;
+uint32_t time_start;
 static void
 wl_surface_frame_done(void *data, struct wl_callback *cb, uint32_t time) {
+    if (!first_frame_done) {
+        first_frame_done = true;
+        time_start = time;
+    }
     struct surface *surface = data;
-    surface->time = time;
+    surface->time = time - time_start;
 
 	/* Destroy this callback */
 	wl_callback_destroy(cb);