diff --git a/.hgignore b/.hgignore
index 48c5d0304..7937da24a 100644
--- a/.hgignore
+++ b/.hgignore
@@ -9,6 +9,7 @@ prosody.cfg.lua
 prosody.version
 config.unix
 *.patch
+*.diff
 *.orig
 *.rej
 *.save