diff --git a/remote.c b/remote.c
index 9f83fe2c4c..af72727d76 100644
--- a/remote.c
+++ b/remote.c
@@ -2279,7 +2279,7 @@ static struct push_cas *add_cas_entry(struct push_cas_option *cas,
 	return entry;
 }
 
-int parse_push_cas_option(struct push_cas_option *cas, const char *arg, int unset)
+static int parse_push_cas_option(struct push_cas_option *cas, const char *arg, int unset)
 {
 	const char *colon;
 	struct push_cas *entry;
diff --git a/remote.h b/remote.h
index dd8c517577..d7992c4ef1 100644
--- a/remote.h
+++ b/remote.h
@@ -290,7 +290,6 @@ struct push_cas_option {
 };
 
 extern int parseopt_push_cas_option(const struct option *, const char *arg, int unset);
-extern int parse_push_cas_option(struct push_cas_option *, const char *arg, int unset);
 
 extern int is_empty_cas(const struct push_cas_option *);
 void apply_push_cas(struct push_cas_option *, struct remote *, struct ref *);