diff --git a/libraries/AP_HAL_ChibiOS/hwdef/scripts/convert_betaflight_unified.py b/libraries/AP_HAL_ChibiOS/hwdef/scripts/convert_betaflight_unified.py
index 0a360657503f84..1e8f9a53f964f9 100755
--- a/libraries/AP_HAL_ChibiOS/hwdef/scripts/convert_betaflight_unified.py
+++ b/libraries/AP_HAL_ChibiOS/hwdef/scripts/convert_betaflight_unified.py
@@ -192,6 +192,9 @@ def convert_file(fname, board_id):
         line = lines[i]
         if line.startswith('resource'):
             a = line.split()
+
+            if a[3] == 'NONE':
+                continue
             # function, number, pin
             pin = convert_pin(a[3])
             resource = [ a[2] , pin, a[1].split('_')[0], a[1] ]