Index: head/audio/gnaural/Makefile
===================================================================
--- head/audio/gnaural/Makefile	(revision 541478)
+++ head/audio/gnaural/Makefile	(revision 541479)
@@ -1,25 +1,27 @@
 # Created by: Ganael Laplanche <ganael.laplanche@martymac.org>
 # $FreeBSD$
 
 PORTNAME=	gnaural
 PORTVERSION=	1.0.20110606
 PORTREVISION=	4
 CATEGORIES=	audio
 MASTER_SITES=	SF/${PORTNAME}/Gnaural/ \
 		LOCAL/martymac
 
 MAINTAINER=	martymac@FreeBSD.org
 COMMENT=	Binaural beat generator
 
 LICENSE=	GPLv2 LGPL21
 LICENSE_COMB=	multi
 
 LIB_DEPENDS=	libportaudio.so:audio/portaudio \
 		libsndfile.so:audio/libsndfile
 
 GNU_CONFIGURE=	yes
 USES=		desktop-file-utils gnome pkgconfig
 USE_CSTD=	gnu89
 USE_GNOME=	libglade2
 
+LDFLAGS+=	-lm
+
 .include <bsd.port.mk>