diff --git a/src/backend/statistics/mcv.c b/src/backend/statistics/mcv.c
index 90e639ba0a3..d1af5d84d00 100644
--- a/src/backend/statistics/mcv.c
+++ b/src/backend/statistics/mcv.c
@@ -908,7 +908,7 @@ statext_mcv_deserialize(bytea *data)
 	 * original values (it might go away).
 	 */
 	datalen = 0;				/* space for by-ref data */
-	map = (Datum **) palloc(ndims * sizeof(Datum **));
+	map = (Datum **) palloc(ndims * sizeof(Datum *));
 
 	for (dim = 0; dim < ndims; dim++)
 	{