diff --git a/src/backend/libpq/auth.c b/src/backend/libpq/auth.c
index b2b0b83a97..c9ba2c6e6d 100644
--- a/src/backend/libpq/auth.c
+++ b/src/backend/libpq/auth.c
@@ -2612,6 +2612,7 @@ CheckLDAPAuth(Port *port)
 			ldap_unbind(ldap);
 			pfree(passwd);
 			pfree(filter);
+			ldap_msgfree(search_message);
 			return STATUS_ERROR;
 		}