diff --git a/m4/.gitignore b/m4/.gitignore
index 6973a55a0b..ae2f6d849d 100644
--- a/m4/.gitignore
+++ b/m4/.gitignore
@@ -14,3 +14,4 @@ lib-prefix.m4
 progtest.m4
 stdint_h.m4
 uintmax_t.m4
+ulonglong.m4