diff --git a/src/compositor-x11.c b/src/compositor-x11.c
index 2d243da..052f088 100644
--- a/src/compositor-x11.c
+++ b/src/compositor-x11.c
@@ -506,6 +506,10 @@ x11_output_wait_for_map(struct x11_compositor *c, struct x11_output *output)
 
 		switch (response_type) {
 		case XCB_MAP_NOTIFY:
+
+			fprintf(stderr,
+				"wait_for_map: XCB_MAP_NOTIFY\n");
+
 			map_notify = (xcb_map_notify_event_t *) event;
 			if (map_notify->window == output->window)
 				mapped = 1;
@@ -515,6 +519,11 @@ x11_output_wait_for_map(struct x11_compositor *c, struct x11_output *output)
 			configure_notify =
 				(xcb_configure_notify_event_t *) event;
 
+			fprintf(stderr,
+				"wait_for_map: XCB_CONFIGURE_NOTIFY %dx%d\n",
+				configure_notify->width,
+				configure_notify->height);
+
 			output->mode.width = configure_notify->width;
 			output->mode.height = configure_notify->height;
 			break;
@@ -1054,6 +1063,7 @@ x11_compositor_handle_event(int fd, uint32_t mask, void *data)
 	xcb_focus_in_event_t *focus_in;
 	xcb_expose_event_t *expose;
 	xcb_atom_t atom;
+	xcb_configure_notify_event_t *configure_notify;
 	uint32_t *k;
 	uint32_t i, set;
 	uint8_t response_type;
@@ -1124,6 +1134,16 @@ x11_compositor_handle_event(int fd, uint32_t mask, void *data)
 		}
 
 		switch (response_type) {
+
+		case XCB_CONFIGURE_NOTIFY:
+			configure_notify =
+				(xcb_configure_notify_event_t *) event;
+
+			fprintf(stderr,
+				"wait_for_map: XCB_CONFIGURE_NOTIFY %dx%d\n",
+				configure_notify->width,
+				configure_notify->height);
+
 		case XCB_KEY_PRESS:
 			key_press = (xcb_key_press_event_t *) event;
 			if (!c->has_xkb)