diff --git a/api/src/org/apache/cloudstack/api/response/UserVmResponse.java b/api/src/org/apache/cloudstack/api/response/UserVmResponse.java
index 2ff1eaa717b..8db4f853243 100644
--- a/api/src/org/apache/cloudstack/api/response/UserVmResponse.java
+++ b/api/src/org/apache/cloudstack/api/response/UserVmResponse.java
@@ -284,7 +284,7 @@ public class UserVmResponse extends BaseResponseWithTagInformation implements Co
 
     @SerializedName(ApiConstants.OS_TYPE_ID)
     @Param(description = "OS type id of the vm", since = "4.4")
-    private Long osTypeId;
+    private String osTypeId;
 
     public UserVmResponse() {
         securityGroupList = new LinkedHashSet<SecurityGroupResponse>();
@@ -810,7 +810,7 @@ public class UserVmResponse extends BaseResponseWithTagInformation implements Co
         this.details = details;
     }
 
-    public void setOsTypeId(Long osTypeId) {
+    public void setOsTypeId(String osTypeId) {
         this.osTypeId = osTypeId;
     }
 
@@ -834,7 +834,7 @@ public class UserVmResponse extends BaseResponseWithTagInformation implements Co
         isDynamicallyScalable = dynamicallyScalable;
     }
 
-    public Long getOsTypeId() {
+    public String getOsTypeId() {
         return osTypeId;
     }
 }
diff --git a/server/src/com/cloud/api/query/dao/UserVmJoinDaoImpl.java b/server/src/com/cloud/api/query/dao/UserVmJoinDaoImpl.java
index f0a0a56e3c6..00ec61ad846 100644
--- a/server/src/com/cloud/api/query/dao/UserVmJoinDaoImpl.java
+++ b/server/src/com/cloud/api/query/dao/UserVmJoinDaoImpl.java
@@ -196,7 +196,7 @@ public class UserVmJoinDaoImpl extends GenericDaoBaseWithTagInformation<UserVmJo
         userVmResponse.setPublicIpId(userVm.getPublicIpUuid());
         userVmResponse.setPublicIp(userVm.getPublicIpAddress());
         userVmResponse.setKeyPairName(userVm.getKeypairName());
-        userVmResponse.setOsTypeId(userVm.getGuestOsId());
+        userVmResponse.setOsTypeId(userVm.getGuestOsUuid());
 
         if (details.contains(VMDetails.all) || details.contains(VMDetails.stats)) {
             // stats calculation