diff --git a/databases/pg_dirtyread/Makefile b/databases/pg_dirtyread/Makefile
index 3ede43ce2b8e..bacfb2522224 100644
--- a/databases/pg_dirtyread/Makefile
+++ b/databases/pg_dirtyread/Makefile
@@ -5,7 +5,7 @@ PORTNAME=	pg_dirtyread
 PORTVERSION=	2.1
 PORTREVISION=	1
 CATEGORIES=	databases
-PKGNAMEPREFIX=	postgresql${PGSQL_VER:S/.//}-
+PKGNAMEPREFIX=	postgresql${PGSQL_VER_NODOT}-
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Read dead but unvacuumed tuples from a PostgreSQL relation