diff --git a/Tools/autotest/test_build_options.py b/Tools/autotest/test_build_options.py
index 4c786cb4fd66ae..d01dce856a0048 100755
--- a/Tools/autotest/test_build_options.py
+++ b/Tools/autotest/test_build_options.py
@@ -370,6 +370,7 @@ def define_is_whitelisted_for_feature_in_code(self, target, define):
         if target.lower() in ["antennatracker"]:
             # missing the init call to the relay library:
             feature_define_whitelist.add(r'AP_RELAY_ENABLED')
+            feature_define_whitelist.add(r'AP_RC_CHANNEL_AUX_FUNCTION_STRINGS_ENABLED')
 
         for some_re in feature_define_whitelist:
             if re.match(some_re, define):