diff --git a/src/ivfbuild.c b/src/ivfbuild.c
index a78dd39..b6a95e5 100644
--- a/src/ivfbuild.c
+++ b/src/ivfbuild.c
@@ -482,7 +482,7 @@ CreateListPages(Relation index, VectorArray centers, int dimensions,
 	Size		listSize;
 	IvfflatList list;
 
-	listSize = MAXALIGN(IVFFLAT_LIST_SIZE(VECTOR_SIZE(dimensions)));
+	listSize = MAXALIGN(IVFFLAT_LIST_SIZE(centers->itemsize));
 	list = palloc0(listSize);
 
 	buf = IvfflatNewBuffer(index, forkNum);