diff --git a/xwords4/linux/.gitignore b/xwords4/linux/.gitignore
index 0d94cb28f..053adcc91 100644
--- a/xwords4/linux/.gitignore
+++ b/xwords4/linux/.gitignore
@@ -2,3 +2,4 @@
 obj_linux_memdbg
 *.xwg
 obj_linux_rel
+*.xwd