diff --git a/ArduCopter/make.inc b/ArduCopter/make.inc
index 4d0cb8eafd..23d8b67576 100644
--- a/ArduCopter/make.inc
+++ b/ArduCopter/make.inc
@@ -43,6 +43,7 @@ LIBRARIES += AC_WPNav
 LIBRARIES += AC_Circle
 LIBRARIES += AP_Declination
 LIBRARIES += AC_Fence
+LIBRARIES += AC_Avoidance
 LIBRARIES += AP_Scheduler
 LIBRARIES += AP_RCMapper
 LIBRARIES += AP_Notify
diff --git a/ArduCopter/wscript b/ArduCopter/wscript
index d9987bfcb4..1c826481cd 100644
--- a/ArduCopter/wscript
+++ b/ArduCopter/wscript
@@ -11,6 +11,7 @@ def build(bld):
             'AC_AttitudeControl',
             'AC_InputManager',
             'AC_Fence',
+            'AC_Avoidance',
             'AC_PID',
             'AC_PrecLand',
             'AC_Sprayer',