diff --git a/lib/datasource.js b/lib/datasource.js
index 51799725..92475fa5 100644
--- a/lib/datasource.js
+++ b/lib/datasource.js
@@ -73,8 +73,8 @@ function DataSource(name, settings) {
       
       if(typeof fn === 'function') {
         this.defineOperation(name, {
-          accepts: fn.accepts,
-          returns: fn.returns,
+          accepts: fn.accepts, 
+          'returns': fn.returns,
           http: fn.http,
           remoteEnabled: fn.shared ? true : false,
           scope: this.DataAccessObject,
@@ -90,8 +90,8 @@ function DataSource(name, settings) {
       if(typeof fn === 'function') {
         this.defineOperation(name, {
           prototype: true,
-          accepts: fn.accepts,
-          returns: fn.returns,
+          accepts: fn.accepts, 
+          'returns': fn.returns,
           http: fn.http,
           remoteEnabled: fn.shared ? true : false,
           scope: this.DataAccessObject.prototype,