diff --git a/src/post_modules/Nettle/.gitignore b/src/post_modules/Nettle/.gitignore
index ac5d9d47382c4f26887878f063a065123446b20c..7411dbb3e950a61ea3fc258b304ccfe146c02417 100644
--- a/src/post_modules/Nettle/.gitignore
+++ b/src/post_modules/Nettle/.gitignore
@@ -17,3 +17,4 @@
 /pike_Nettle.feature
 /propagated_variables
 /stamp-h
+/mac.c