diff --git a/mk/make.inc b/mk/make.inc
index 73c8adab44..b505cddbcb 100644
--- a/mk/make.inc
+++ b/mk/make.inc
@@ -14,3 +14,4 @@ LIBRARIES += AP_SBusOut
 LIBRARIES += AP_TempCalibration
 LIBRARIES += AP_Radio
 LIBRARIES += AP_Param_Helper
+LIBRARIES += AP_VisualOdom