diff --git a/src/core/Service.js b/src/core/Service.js
index f90be91af..33729dd0e 100644
--- a/src/core/Service.js
+++ b/src/core/Service.js
@@ -59,6 +59,7 @@ Service.prototype.callService = function(request, callback, failedCallback) {
     op : 'call_service',
     id : serviceCallId,
     service : this.name,
+    type: this.serviceType,
     args : request
   };
   this.ros.callOnConnection(call);