diff --git a/src/backend/executor/functions.c b/src/backend/executor/functions.c
index c0261fe..0882671 100644
--- a/src/backend/executor/functions.c
+++ b/src/backend/executor/functions.c
@@ -637,8 +637,7 @@ fmgr_sql(PG_FUNCTION_ARGS)
                 */
                if (!rsi || !IsA(rsi, ReturnSetInfo) ||
                        (rsi->allowedModes & SFRM_ValuePerCall) == 0 ||
-                       (rsi->allowedModes & SFRM_Materialize) == 0 ||
-                       rsi->expectedDesc == NULL)
+                       (rsi->allowedModes & SFRM_Materialize) == 0)
                        ereport(ERROR,
                                        (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                                         errmsg("set-valued function