diff --git a/.gitignore b/.gitignore
index dfa3a07dd..8887b0dba 100644
--- a/.gitignore
+++ b/.gitignore
@@ -40,6 +40,7 @@ nbdist/
 *.xml.versionsBackup
 
 target/*
+*.bak
 
 !*/build/*.java
 !*/build/*.html