diff --git a/src/backend/commands/repack.c b/src/backend/commands/repack.c
index 67364cc60e3..8cfc3fde5c7 100644
--- a/src/backend/commands/repack.c
+++ b/src/backend/commands/repack.c
@@ -925,7 +925,8 @@ check_concurrent_repack_requirements(Relation rel, Oid *ident_idx_p)
 	 * work and is not implemented yet.
 	 */
 	ident_idx = RelationGetReplicaIndex(rel);
-	if (!OidIsValid(ident_idx) && OidIsValid(rel->rd_pkindex))
+	if (!OidIsValid(ident_idx) && OidIsValid(rel->rd_pkindex) &&
+		!rel->rd_ispkdeferrable)
 		ident_idx = rel->rd_pkindex;
 	if (!OidIsValid(ident_idx))
 		ereport(ERROR,