diff --git a/lib/resources/messages.js b/lib/resources/messages.js
index 9339ab0..4942ded 100644
--- a/lib/resources/messages.js
+++ b/lib/resources/messages.js
@@ -94,10 +94,14 @@ export class MessageInterface extends PlivoResourceInterface {
     }
 
     let params = optionalParams || {};
-    params.src = src;
+    if (src) {
+      params.src = src;
+    }
     params.dst = _.isArray(dst) ? _.join(dst, '<') : dst;
     params.text = text;
-    params.powerpackUUID = powerpackUUID;
+    if (powerpackUUID) {
+      params.powerpackUUID = powerpackUUID;
+    }
     console.log(params)
     return super.create(params);
   }