diff --git a/libudev/docs/.gitignore b/libudev/docs/.gitignore
index e06b113e2..6fe7fd15d 100644
--- a/libudev/docs/.gitignore
+++ b/libudev/docs/.gitignore
@@ -2,6 +2,7 @@ html/
 tmpl/
 xml/
 *.stamp
+*.bak
 version.xml
 libudev-decl-list.txt
 libudev-decl.txt