diff --git a/xwords4/android/XWords4/.gitignore b/xwords4/android/XWords4/.gitignore
index f421e79bf..4c12c0a29 100644
--- a/xwords4/android/XWords4/.gitignore
+++ b/xwords4/android/XWords4/.gitignore
@@ -4,3 +4,4 @@ local.properties
 bin
 gen
 libs
+proguard.cfg