kmx.io/git-auth

diff --git a/git-auth.c b/git-auth.c
index e839ded..4384a20 100644
--- a/git-auth.c
+++ b/git-auth.c
@@ -17,6 +17,7 @@
 
 #include <assert.h>
 #include <err.h>
+#include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>