--- /usr/portage/xfce-base/xfce4-panel/xfce4-panel-4.12.0.ebuild	2015-07-11 03:01:20.000000000 -0400
+++ /usr/portage/xfce-base/xfce4-panel/xfce4-panel-4.12.0.ebuild	2015-07-04 08:32:25.000000000 -0400
@@ -11,14 +11,14 @@ 
 
 LICENSE="GPL-2 LGPL-2.1"
 SLOT="0"
 KEYWORDS="~alpha amd64 arm ~arm64 hppa ~ia64 ~mips ~ppc ~ppc64 ~sparc x86 ~x86-fbsd ~x86-freebsd ~x86-interix ~amd64-linux ~x86-linux ~x86-solaris"
-IUSE="debug"
+IUSE="debug +gtk3"
 
 RDEPEND=">=dev-libs/dbus-glib-0.100
 	>=dev-libs/glib-2.24
 	>=x11-libs/cairo-1
 	>=x11-libs/gtk+-2.20:2
-	>=x11-libs/gtk+-3.2:3
+	gtk3? ( >=x11-libs/gtk+-3.2:3 )
 	x11-libs/libX11
 	>=x11-libs/libwnck-2.31:1
 	>=xfce-base/exo-0.8
@@ -35,7 +35,7 @@ 
 pkg_setup() {
 	XFCONF=(
 		--docdir="${EPREFIX}"/usr/share/doc/${PF}
-		--enable-gtk3
+		$(use_enable gtk3)
 		$(xfconf_use_debug)
 		--with-html-dir="${EPREFIX}"/usr/share/doc/${PF}/html
 		)