diff --git a/keyboards/converter/sun_usb/rules.mk b/keyboards/converter/sun_usb/rules.mk
index e03b374f3..6e36a1905 100644
--- a/keyboards/converter/sun_usb/rules.mk
+++ b/keyboards/converter/sun_usb/rules.mk
@@ -40,3 +40,5 @@ ifdef HARDWARE_SERIAL
 else
         SRC += protocol/serial_soft.c
 endif
+
+DEFAULT_FOLDER = converter/sun_usb/type5