diff --git a/src/x.c b/src/x.c
index e598345..42bee3f 100644
--- a/src/x.c
+++ b/src/x.c
@@ -449,9 +449,10 @@ void x_set_picture_clip_region(xcb_connection_t *c, xcb_render_picture_t pict,
 }
 
 void x_clear_picture_clip_region(xcb_connection_t *c, xcb_render_picture_t pict) {
+	assert(pict != XCB_NONE);
 	xcb_render_change_picture_value_list_t v = {.clipmask = XCB_NONE};
 	xcb_generic_error_t *e = xcb_request_check(
-	    c, xcb_render_change_picture(c, pict, XCB_RENDER_CP_CLIP_MASK, &v));
+	    c, xcb_render_change_picture_checked(c, pict, XCB_RENDER_CP_CLIP_MASK, &v));
 	if (e) {
 		log_error_x_error(e, "failed to clear clip region");
 		free(e);