diff --git a/src/hnswutils.c b/src/hnswutils.c
index 1dd6125..ed74f5a 100644
--- a/src/hnswutils.c
+++ b/src/hnswutils.c
@@ -379,7 +379,9 @@ HnswUpdateMetaPage(Relation index, int updateEntry, HnswElement entryPoint, Bloc
 
 	HnswUpdateMetaPageInfo(page, updateEntry, entryPoint, insertPage);
 
-	if (!building)
+	if (building)
+		MarkBufferDirty(buf);
+	else
 		GenericXLogFinish(state);
 	UnlockReleaseBuffer(buf);
 }