--- a/src/backend/commands/indexcmds.c
+++ b/src/backend/commands/indexcmds.c
@@ -4131,6 +4131,8 @@ ReindexRelationConcurrently(const ReindexStmt *stmt, Oid relationOid, const Rein
 		CommandCounterIncrement();
 	}
 
+	WaitForLockersMultiple(lockTags, AccessExclusiveLock, true);
+
 	/* Commit this transaction and make index swaps visible */
 	CommitTransactionCommand();
 	StartTransactionCommand();