diff --git a/builtin/config.c b/builtin/config.c
index c836ad063c..e24586efa5 100644
--- a/builtin/config.c
+++ b/builtin/config.c
@@ -379,7 +379,7 @@ int cmd_config(int argc, const char **argv, const char *prefix)
 	}
 
 	if (use_global_config) {
-		char *home = get_home_directory();
+		const char *home = get_home_directory();
 		if (home) {
 			char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
 			given_config_file = user_config;