--- /usr/portage/dev-libs/libappindicator/libappindicator-12.10.0-r200.ebuild	2015-05-11 16:31:06.000000000 +0200
+++ libappindicator-12.10.0-r200.ebuild	2015-07-06 15:35:35.391469616 +0200
@@ -51,7 +51,8 @@
 	econf \
 		--disable-silent-rules \
 		--disable-static \
-		--with-gtk=2
+		--with-gtk=2 \
+		$(use_enable introspection)
 }
 
 multilib_src_install() {