diff --git a/ArduCopter/make.inc b/ArduCopter/make.inc
index 23d8b67576..7633713c30 100644
--- a/ArduCopter/make.inc
+++ b/ArduCopter/make.inc
@@ -60,3 +60,4 @@ LIBRARIES += AC_PrecLand
 LIBRARIES += AP_IRLock
 LIBRARIES += AC_InputManager
 LIBRARIES += AP_ADSB
+LIBRARIES += AP_Avoidance
diff --git a/ArduCopter/wscript b/ArduCopter/wscript
index 1c826481cd..2b7f39dccc 100644
--- a/ArduCopter/wscript
+++ b/ArduCopter/wscript
@@ -28,6 +28,7 @@ def build(bld):
             'AP_RCMapper',
             'AP_Relay',
             'AP_ServoRelayEvents',
+            'AP_Avoidance',
         ],
         use='mavlink',
     )