diff -ruN /usr/ports/deskutils/osmo/Makefile ./osmo/Makefile
--- /usr/ports/deskutils/osmo/Makefile	2010-05-23 14:41:21.000000000 -0700
+++ ./osmo/Makefile	2010-05-23 14:54:01.000000000 -0700
@@ -17,14 +17,16 @@
 		notify:${PORTSDIR}/devel/libnotify \
 		ical:${PORTSDIR}/devel/libical \
 		tar:${PORTSDIR}/devel/libtar \
-		gringotts:${PORTSDIR}/security/libgringotts
+		gringotts:${PORTSDIR}/security/libgringotts \
+		gtkhtml:${PORTSDIR}/www/libgtkhtml
 
 USE_GNOME=	gtk20
 USE_GETTEXT=	yes
 INSTALLS_ICONS=	yes
 
 GNU_CONFIGURE=	yes
-CONFIGURE_ENV+=	LDFLAGS="-L${LOCALBASE}/lib"
+CONFIGURE_ENV+=	LDFLAGS="-L${LOCALBASE}/lib" \
+		CFLAGS="${CFLAGS} -I${LOCALBASE}/include/libical"
 
 USE_GMAKE=	yes