diff --git a/dgl/src/pugl/pugl_x11.c b/dgl/src/pugl/pugl_x11.c
index 60be55e7..95f0d3dc 100644
--- a/dgl/src/pugl/pugl_x11.c
+++ b/dgl/src/pugl/pugl_x11.c
@@ -441,7 +441,7 @@ dispatchKey(PuglView* view, XEvent* event, bool press)
 		view->redisplay = false;
 		return;
 	}
-	if (n == 0) {
+	if (n == 0 && sym == 0) {
 		goto send_event;
 		return;
 	}