diff --git a/appc-provider/appc-provider-model/src/main/yang/appc-provider-lcm.yang b/appc-provider/appc-provider-model/src/main/yang/appc-provider-lcm.yang
index 5ff992a..2ef9e54 100644
--- a/appc-provider/appc-provider-model/src/main/yang/appc-provider-lcm.yang
+++ b/appc-provider/appc-provider-model/src/main/yang/appc-provider-lcm.yang
@@ -786,7 +786,7 @@
                 uses action-identifiers;
                 leaf payload {
                     type payload;
-                    mandatory false;
+                    mandatory true;
                 }
             }
             output {