diff --git a/browser/base/moz.build b/browser/base/moz.build
index 2f2807a246c262298d0802a6a80abe211c99732c..089a86c9e7f69b994657f20fb2392f3dcc8646bf 100644
--- a/browser/base/moz.build
+++ b/browser/base/moz.build
@@ -81,3 +81,5 @@ 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"]