Index: head/comms/birda/Makefile
===================================================================
--- head/comms/birda/Makefile	(revision 546687)
+++ head/comms/birda/Makefile	(revision 546688)
@@ -1,14 +1,17 @@
 # Created by: Brandon S. Allbery KF8NH <allbery@ece.cmu.edu>
 # $FreeBSD$
 
 PORTNAME=	birda
 PORTVERSION=	1.3
 CATEGORIES=	comms
 MASTER_SITES=	ftp://ftp.netbsd.org/pub/pkgsrc/distfiles/
 
 MAINTAINER=	mjl@luckie.org.nz
 COMMENT=	Bohlin's IrDA utilities, ported from NetBSD's pkgsrc
 
 USES=		uidfix
 
+# Fix build with clang11
+CFLAGS+=	-fcommon
+
 .include <bsd.port.mk>