diff --git a/src/backend/storage/buffer/bufmgr.c b/src/backend/storage/buffer/bufmgr.c
index 3c59bbd04e..1bc3f46398 100644
--- a/src/backend/storage/buffer/bufmgr.c
+++ b/src/backend/storage/buffer/bufmgr.c
@@ -1875,8 +1875,7 @@ ExtendBufferedRelShared(ExtendBufferedWhat eb,
 	if (!(flags & EB_SKIP_EXTENSION_LOCK))
 	{
 		LockRelationForExtension(eb.rel, ExclusiveLock);
-		if (eb.rel)
-			eb.smgr = RelationGetSmgr(eb.rel);
+		eb.smgr = RelationGetSmgr(eb.rel);
 	}
 
 	/*