diff --git a/security/gpa/Makefile b/security/gpa/Makefile
index c1fd84c940d0..fc2e08c526b3 100644
--- a/security/gpa/Makefile
+++ b/security/gpa/Makefile
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.4 2002/01/17 10:28:25 martti Exp $
+# $NetBSD: Makefile,v 1.5 2002/01/18 07:21:30 martti Exp $
 #
 
 DISTNAME=	gpa-0.4.3
@@ -11,6 +11,10 @@ COMMENT=	GUI frontend to gnupg
 
 DEPENDS+=	gnupg>=1.0.6:../../security/gnupg
 
+# This can't be compiled on alpha/powerpc because __va_list is defined
+# as struct in include/ansi.h instead of "char *"
+NOT_FOR_PLATFORM=	*-*-alpha *-*-*ppc
+
 GNU_CONFIGURE=		YES
 USE_BUILDLINK_ONLY=	YES