diff --git a/xwords4/android/XWords4/.gitignore b/xwords4/android/XWords4/.gitignore
index 5dfbbc251..a1e5aa759 100644
--- a/xwords4/android/XWords4/.gitignore
+++ b/xwords4/android/XWords4/.gitignore
@@ -17,3 +17,4 @@ local.properties
 obj
 proguard.cfg
 res/drawable*/*gen.png
+.idea/