diff --git a/libraries/AP_Mission/AP_Mission.h b/libraries/AP_Mission/AP_Mission.h
index cb71542b71..a6fe6f9c12 100644
--- a/libraries/AP_Mission/AP_Mission.h
+++ b/libraries/AP_Mission/AP_Mission.h
@@ -216,7 +216,10 @@ public:
     };
 
     // main program function pointers
-#if APM_BUILD_DELEGATES
+#if APM_BUILD_FUNCTOR
+    FUNCTOR_TYPEDEF(mission_cmd_fn_t, bool, const Mission_Command&);
+    FUNCTOR_TYPEDEF(mission_complete_fn_t, void);
+#elif APM_BUILD_DELEGATES
     typedef DELEGATE_FUNCTION1(bool, const Mission_Command&) mission_cmd_fn_t;
     typedef DELEGATE_FUNCTION0(void) mission_complete_fn_t;
 #else