diff --git a/b2g/dev/config/mozconfigs/win32/mulet b/b2g/dev/config/mozconfigs/win32/mulet
new file mode 100644
index 000000000000..a5d1c79146c1
--- /dev/null
+++ b/b2g/dev/config/mozconfigs/win32/mulet
@@ -0,0 +1,3 @@
+. "$topsrcdir/browser/config/mozconfigs/win32/nightly"
+
+ac_add_options --enable-application=b2g/dev