diff --git a/config.c b/config.c
index b76fe4c6dc..e7d91f5847 100644
--- a/config.c
+++ b/config.c
@@ -331,9 +331,9 @@ int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
 		return 1;
 	if (!*value)
 		return 0;
-	if (!strcasecmp(value, "true") || !strcasecmp(value, "yes"))
+	if (!strcasecmp(value, "true") || !strcasecmp(value, "yes") || !strcasecmp(value, "on"))
 		return 1;
-	if (!strcasecmp(value, "false") || !strcasecmp(value, "no"))
+	if (!strcasecmp(value, "false") || !strcasecmp(value, "no") || !strcasecmp(value, "off"))
 		return 0;
 	*is_bool = 0;
 	return git_config_int(name, value);