diff --git a/x11-toolkits/gnustep-gui/Makefile b/x11-toolkits/gnustep-gui/Makefile
index 2296a665ec71..a8f1dbb07a10 100644
--- a/x11-toolkits/gnustep-gui/Makefile
+++ b/x11-toolkits/gnustep-gui/Makefile
@@ -38,6 +38,7 @@ USE_GNUSTEP_LDCONFIG=	${GNUSTEP_SYSTEM_LIBRARIES}
 USE_XLIB=	yes
 
 EXTRA_PATCHES+=		${FILESDIR}/GNUmakefile.patch
+CONFIGURE_ENV+=	CPPFLAGS="${CPPFLAGS}" LDFLAGS="${LDFLAGS}"
 MAKE_FLAGS+=	OPTFLAG="${CFLAGS}"
 BREAKS_IF_PEDANTIC=	yes
 
@@ -49,6 +50,13 @@ IGNORE=		requires procfs mounted to build or run, for details see procfs(5)
 .endif
 .endif
 
+.if defined(WITH_PORTAUDIO2)
+LIB_DEPENDS+=	portaudio:${PORTSDIR}/audio/portaudio2
+CPPFLAGS+=	-I${LOCALBASE}/include/portaudio2 ${PTHREAD_CFLAGS}
+CFLAGS+=	${PTHREAD_CFLAGS}
+LDFLAGS+=	-L${LOCALBASE}/lib/portaudio2 ${PTHREAD_LIBS}
+.endif
+
 .if !defined(WITHOUT_CUPS)
 LIB_DEPENDS+=	cups.2:${PORTSDIR}/print/cups-base
 PLIST_SUB+=	WITH_CUPS=""