diff --git a/libraries/AP_Param/AP_Param.h b/libraries/AP_Param/AP_Param.h
index a7f47c814b..9433758377 100644
--- a/libraries/AP_Param/AP_Param.h
+++ b/libraries/AP_Param/AP_Param.h
@@ -1018,6 +1018,9 @@ public:
     operator const eclass () const {
         return (eclass)_value;
     }
+    void set(eclass v) {
+        AP_Int8::set(int8_t(v));
+    }
 };
 
 template<typename eclass>
@@ -1027,4 +1030,7 @@ public:
     operator const eclass () const {
         return (eclass)_value;
     }
+    void set(eclass v) {
+        AP_Int16::set(int16_t(v));
+    }
 };