diff --git a/bar.c b/bar.c
index 148f013..5020a71 100644
--- a/bar.c
+++ b/bar.c
@@ -440,7 +440,7 @@ run(struct bar_run_context *run_ctx)
             case XCB_REPARENT_NOTIFY:
             case XCB_CONFIGURE_NOTIFY:
             case XCB_MAP_NOTIFY:
-                LOG_WARN("unimplemented event");
+                LOG_WARN("unimplemented event: %d", XCB_EVENT_RESPONSE_TYPE(e));
                 break;
 
             default: