diff --git a/ArduSub/wscript b/ArduSub/wscript
index eb7c03055c..e9c4b3cd92 100644
--- a/ArduSub/wscript
+++ b/ArduSub/wscript
@@ -8,7 +8,6 @@ def build(bld):
         ap_vehicle=vehicle,
         ap_libraries=bld.ap_common_vehicle_libraries() + [
             'AC_AttitudeControl',
-            'AC_PID',
             'AC_WPNav',
             'AP_Camera',
             'AP_InertialNav',