diff --git a/main.c b/main.c
index df040e1..5057da0 100644
--- a/main.c
+++ b/main.c
@@ -1208,7 +1208,10 @@ int main(int argc, char **argv) {
 
 	struct wl_registry *registry = wl_display_get_registry(state.display);
 	wl_registry_add_listener(registry, &registry_listener, &state);
-	wl_display_roundtrip(state.display);
+	if (wl_display_roundtrip(state.display) == -1) {
+		swaylock_log(LOG_ERROR, "wl_display_roundtrip() failed");
+		return EXIT_FAILURE;
+	}
 
 	if (!state.compositor) {
 		swaylock_log(LOG_ERROR, "Missing wl_compositor");