diff --git a/m4/.gitignore b/m4/.gitignore
index 0880f7534..1655cffb2 100644
--- a/m4/.gitignore
+++ b/m4/.gitignore
@@ -168,3 +168,4 @@ xsize.m4
 /usleep.m4
 /stdarg.m4
 /xvasprintf.m4
+/intmax.m4