--- build/config/linux/gtk/BUILD.gn.orig	2017-04-19 19:06:28 UTC
+++ build/config/linux/gtk/BUILD.gn
@@ -5,7 +5,7 @@
 import("//build/config/linux/gtk/gtk.gni")
 import("//build/config/linux/pkg_config.gni")
 
-assert(is_linux, "This file should only be referenced on Linux")
+assert(is_linux || is_bsd, "This file should only be referenced on Linux")
 
 # The target in this file will automatically reference GTK2 or GTK3 depending
 # on the state of the build flag. Some builds reference both 2 and 3, and some