diff --git a/ext/ldap/ldap.c b/ext/ldap/ldap.c
index d0760ede44d..096b4e18c05 100644
--- a/ext/ldap/ldap.c
+++ b/ext/ldap/ldap.c
@@ -3816,7 +3816,7 @@ PHP_FUNCTION(ldap_start_tls)
 
 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && defined(HAVE_3ARG_SETREBINDPROC)
 /* {{{ _ldap_rebind_proc() */
-int _ldap_rebind_proc(LDAP *ldap, const char *url, ber_tag_t req, ber_int_t msgid, void *params)
+static int _ldap_rebind_proc(LDAP *ldap, const char *url, ber_tag_t req, ber_int_t msgid, void *params)
 {
 	ldap_linkdata *ld = NULL;
 	int retval;