diff --git a/mk/make.inc b/mk/make.inc
index a69b3eefbc..f4d155052e 100644
--- a/mk/make.inc
+++ b/mk/make.inc
@@ -24,3 +24,4 @@ LIBRARIES += AC_Sprayer
 LIBRARIES += AC_Avoidance
 LIBRARIES += AP_LandingGear
 LIBRARIES += AC_AutoTune
+LIBRARIES += AP_RobotisServo