diff --git a/connection.c b/connection.c
index ae751c0f..7c4d2862 100644
--- a/connection.c
+++ b/connection.c
@@ -1779,6 +1779,8 @@ CC_internal_rollback(ConnectionClass *self, int rollback_type, BOOL ignore_abort
 					default:
 						handle_pgres_error(self, pgres, __FUNCTION__, NULL, !ret);
 				}
+				PQclear(pgres);
+				pgres = NULL;
 			}
 			if (!ret)
 			{