diff --git a/src/backend/executor/nodeModifyTable.c b/src/backend/executor/nodeModifyTable.c
index 6f0f47e..f745f5e 100644
--- a/src/backend/executor/nodeModifyTable.c
+++ b/src/backend/executor/nodeModifyTable.c
@@ -229,6 +229,12 @@ ExecInsert(TupleTableSlot *slot,
 	else if (resultRelInfo->ri_FdwRoutine)
 	{
 		/*
+		 * Check the constraints of the tuple
+		 */
+		if (resultRelationDesc->rd_att->constr)
+			ExecConstraints(resultRelInfo, slot, estate);
+
+		/*
 		 * insert into foreign table: let the FDW do it
 		 */
 		slot = resultRelInfo->ri_FdwRoutine->ExecForeignInsert(estate,
@@ -641,6 +647,9 @@ ExecUpdate(ItemPointer tupleid,
 	}
 	else if (resultRelInfo->ri_FdwRoutine)
 	{
+		if (resultRelationDesc->rd_att->constr)
+			ExecConstraints(resultRelInfo, slot, estate);
+
 		/*
 		 * update in foreign table: let the FDW do it
 		 */