diff --git a/api/src/com/cloud/api/commands/CreateNetworkACLCmd.java b/api/src/com/cloud/api/commands/CreateNetworkACLCmd.java
index 05f862a3e65..033a496d35d 100644
--- a/api/src/com/cloud/api/commands/CreateNetworkACLCmd.java
+++ b/api/src/com/cloud/api/commands/CreateNetworkACLCmd.java
@@ -78,7 +78,7 @@ public class CreateNetworkACLCmd extends BaseAsyncCreateCmd implements FirewallR
         description="The network of the vm the ACL will be created for")
     private Long networkId;
     
-    @Parameter(name=ApiConstants.TRAFFIC_TYPE, type=CommandType.LONG, description="the traffic type for the ACL," +
+    @Parameter(name=ApiConstants.TRAFFIC_TYPE, type=CommandType.STRING, description="the traffic type for the ACL," +
     		"can be Ingress or Egress, defaulted to Ingress if not specified")
     private String trafficType;