diff --git a/xwords4/android/XWords4/.gitignore b/xwords4/android/XWords4/.gitignore
index a1e5aa759..5d74e0ed5 100644
--- a/xwords4/android/XWords4/.gitignore
+++ b/xwords4/android/XWords4/.gitignore
@@ -18,3 +18,4 @@ obj
 proguard.cfg
 res/drawable*/*gen.png
 .idea/
+*.iml