diff --git a/browser/base/moz.build b/browser/base/moz.build
index 086b462e706bb46727d0fed85b4c98debaeaf721..44a4fcb9b8181678667ee11b0443eed681dd2a43 100644
--- a/browser/base/moz.build
+++ b/browser/base/moz.build
@@ -82,3 +82,5 @@ DEFINES["MOZ_APP_VERSION_DISPLAY"] = CONFIG["MOZ_APP_VERSION_DISPLAY"]
 DEFINES["APP_LICENSE_BLOCK"] = "%s/content/overrides/app-license.html" % SRCDIR
 
 JAR_MANIFESTS += ["jar.mn"]
+
+DIRS += ["../../zen"]