diff --git a/src/sunstone/public/app/tabs/hosts-tab/form-panels/create.js b/src/sunstone/public/app/tabs/hosts-tab/form-panels/create.js
index afe05c9879..2903e2c76c 100644
--- a/src/sunstone/public/app/tabs/hosts-tab/form-panels/create.js
+++ b/src/sunstone/public/app/tabs/hosts-tab/form-panels/create.js
@@ -262,7 +262,9 @@ define(function(require) {
       host_json["host"]["region_name"] = region_name;
       host_json["host"]["ec2_secret"] = ec2_secret;
       host_json["host"]["ec2_access"] = ec2_access;
-      host_json["host"]["capacity"] = capacity;
+      if (capacity.length > 0){
+        host_json["host"]["capacity"] = capacity;
+      }
     }
     //Create the OpenNebula.Host.
     //If it is successfull we refresh the list.