diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index 6a53a05129..c1084aaf8d 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -5643,6 +5643,9 @@ getOwnedSeqs(Archive *fout, TableInfo tblinfo[], int numTables)
 			continue;			/* not an owned sequence */
 
 		owning_tab = findTableByOid(seqinfo->owning_tab);
+		if (owning_tab == NULL)
+			exit_horribly(NULL, "failed sanity check, parent table OID %u of sequence OID %u not found\n",
+						  seqinfo->owning_tab, seqinfo->dobj.catId.oid);
 
 		/*
 		 * We need to dump the components that are being dumped for the table
@@ -15583,7 +15586,11 @@ dumpSequence(Archive *fout, TableInfo *tbinfo)
 	{
 		TableInfo  *owning_tab = findTableByOid(tbinfo->owning_tab);
 
-		if (owning_tab && owning_tab->dobj.dump & DUMP_COMPONENT_DEFINITION)
+		if (owning_tab == NULL)
+			exit_horribly(NULL, "failed sanity check, parent table OID %u of sequence OID %u not found\n",
+						  tbinfo->owning_tab, tbinfo->dobj.catId.oid);
+
+		if (owning_tab->dobj.dump & DUMP_COMPONENT_DEFINITION)
 		{
 			resetPQExpBuffer(query);
 			appendPQExpBuffer(query, "ALTER SEQUENCE %s",