diff --git a/x11-wm/xpra/xpra-3.0.2.ebuild b/x11-wm/xpra/xpra-3.0.2.ebuild
index 066355135f200..2f4009ac5579f 100644
--- a/x11-wm/xpra/xpra-3.0.2.ebuild
+++ b/x11-wm/xpra/xpra-3.0.2.ebuild
@@ -66,6 +66,7 @@ RDEPEND="${COMMON_DEPEND}
 	dev-python/pillow[jpeg?,${PYTHON_USEDEP}]
 	virtual/ssh
 	x11-apps/xmodmap
+	x11-libs/gtk+:3[introspection]
 	cups? ( dev-python/pycups[${PYTHON_USEDEP}] )
 	dbus? ( dev-python/dbus-python[${PYTHON_USEDEP}] )
 	lz4? ( dev-python/lz4[${PYTHON_USEDEP}] )