diff --git a/Tools/ardupilotwaf/ardupilotwaf.py b/Tools/ardupilotwaf/ardupilotwaf.py
index added1ee31..f5260ec046 100644
--- a/Tools/ardupilotwaf/ardupilotwaf.py
+++ b/Tools/ardupilotwaf/ardupilotwaf.py
@@ -76,6 +76,7 @@ COMMON_VEHICLE_DEPENDENT_LIBRARIES = [
     'AP_Gripper',
     'AP_RTC',
     'AC_Sprayer',
+    'AC_Avoidance',
 ]
 
 def get_legacy_defines(sketch_name):