diff --git a/config/alfresco/templates/webscripts/org/alfresco/repository/workflow/workflow-instances.get.desc.xml b/config/alfresco/templates/webscripts/org/alfresco/repository/workflow/workflow-instances.get.desc.xml
index 89b241cf94..ec8a53fbfa 100644
--- a/config/alfresco/templates/webscripts/org/alfresco/repository/workflow/workflow-instances.get.desc.xml
+++ b/config/alfresco/templates/webscripts/org/alfresco/repository/workflow/workflow-instances.get.desc.xml
@@ -1,7 +1,7 @@
 <webscript>
    <shortname>Get Workflow Instance Collection</shortname>
    <description>Retrieves all workflow instances, the returned list can be optionally filtered by the state of the workflow instance and by the authority that initiated the workflow instance.</description>
-   <url>/api/workflow-instances?state={state?}&amp;initiator={initiator?}&amp;priority={priority?}&amp;dueBefore={dueBefore?}&amp;dueAfter={dueAfter?}&amp;definitionId={workflow_definition_id?}&amp;startedBefore={startedBefore?}&amp;startedAfter={startedAfter?}&amp;completedBefore={completedBefore?}&amp;completedAfter={completedAfter?}&amp;maxItems={maxItems?}&amp;skipCount={skipCount?}&amp;exclude={exclude?}</url>
+   <url>/api/workflow-instances?state={state?}&amp;initiator={initiator?}&amp;priority={priority?}&amp;dueBefore={dueBefore?}&amp;dueAfter={dueAfter?}&amp;definitionId={definitionId?}&amp;definitionName={definitionName?}&amp;startedBefore={startedBefore?}&amp;startedAfter={startedAfter?}&amp;completedBefore={completedBefore?}&amp;completedAfter={completedAfter?}&amp;maxItems={maxItems?}&amp;skipCount={skipCount?}&amp;exclude={exclude?}</url>
    <url>/api/workflow-definitions/{workflow_definition_id}/workflow-instances?state={state?}&amp;initiator={initiator?}&amp;priority={priority?}&amp;dueBefore={dueBefore?}&amp;dueAfter={dueAfter?}&amp;startedBefore={startedBefore?}&amp;startedAfter={startedAfter?}&amp;completedBefore={completedBefore?}&amp;completedAfter={completedAfter?}&amp;maxItems={maxItems?}&amp;skipCount={skipCount?}&amp;exclude={exclude?}</url>
    <format default="json"/>
    <authentication>user</authentication>
diff --git a/source/java/org/alfresco/repo/web/scripts/workflow/WorkflowInstancesGet.java b/source/java/org/alfresco/repo/web/scripts/workflow/WorkflowInstancesGet.java
index 8cf4299636..e56e4d46b3 100644
--- a/source/java/org/alfresco/repo/web/scripts/workflow/WorkflowInstancesGet.java
+++ b/source/java/org/alfresco/repo/web/scripts/workflow/WorkflowInstancesGet.java
@@ -51,6 +51,7 @@ public class WorkflowInstancesGet extends AbstractWorkflowWebscript
     public static final String PARAM_STARTED_AFTER = "startedAfter";
     public static final String PARAM_COMPLETED_BEFORE = "completedBefore";
     public static final String PARAM_COMPLETED_AFTER = "completedAfter";
+    public static final String PARAM_DEFINITION_NAME = "definitionName";
     public static final String PARAM_DEFINITION_ID = "definitionId";
     public static final String VAR_DEFINITION_ID = "workflow_definition_id";
     
@@ -66,6 +67,7 @@ public class WorkflowInstancesGet extends AbstractWorkflowWebscript
         filters.put(PARAM_STATE, req.getParameter(PARAM_STATE));
         filters.put(PARAM_INITIATOR, req.getParameter(PARAM_INITIATOR));
         filters.put(PARAM_PRIORITY, req.getParameter(PARAM_PRIORITY));
+        filters.put(PARAM_DEFINITION_NAME, req.getParameter(PARAM_DEFINITION_NAME));
         
         String excludeParam = req.getParameter(PARAM_EXCLUDE);
         if (excludeParam != null && excludeParam.length() > 0)
@@ -154,6 +156,49 @@ public class WorkflowInstancesGet extends AbstractWorkflowWebscript
                         break;
                     }
                 }
+                else if (key.equals(PARAM_INITIATOR))
+                {
+                    NodeRef initiator = workflowInstance.getInitiator();
+                    
+                    if (initiator == null)
+                    {
+                        result = false;
+                        break;
+                    }
+                    else
+                    {
+                        if (!nodeService.exists(initiator) || 
+                            !filterValue.equals(nodeService.getProperty(workflowInstance.getInitiator(), ContentModel.PROP_USERNAME)))
+                        {
+                            result = false;
+                            break;
+                        }
+                    }
+                }
+                else if (key.equals(PARAM_PRIORITY))
+                {
+                    String priority = "0";
+                    if (workflowInstance.getPriority() != null)
+                    {
+                        priority = workflowInstance.getPriority().toString();
+                    }
+
+                    if (!filterValue.equals(priority))
+                    {
+                        result = false;
+                        break;
+                    }
+                }
+                else if (key.equals(PARAM_DEFINITION_NAME))
+                {
+                    String definitionName = workflowInstance.getDefinition().getName();
+                    
+                    if (!filterValue.equals(definitionName))
+                    {
+                        result = false;
+                        break;
+                    }
+                }
                 else if (key.equals(PARAM_STATE))
                 {
                     WorkflowState filter = WorkflowState.getState(filterValue.toString());
@@ -228,39 +273,6 @@ public class WorkflowInstancesGet extends AbstractWorkflowWebscript
                         break;
                     }
                 }
-                else if (key.equals(PARAM_INITIATOR))
-                {
-                    NodeRef initiator = workflowInstance.getInitiator();
-                    
-                    if (initiator == null)
-                    {
-                        result = false;
-                        break;
-                    }
-                    else
-                    {
-                        if (!nodeService.exists(initiator) || 
-                            !filterValue.equals(nodeService.getProperty(workflowInstance.getInitiator(), ContentModel.PROP_USERNAME)))
-                        {
-                            result = false;
-                            break;
-                        }
-                    }
-                }
-                else if (key.equals(PARAM_PRIORITY))
-                {
-                    String priority = "0";
-                    if (workflowInstance.getPriority() != null)
-                    {
-                        priority = workflowInstance.getPriority().toString();
-                    }
-
-                    if (!filterValue.equals(priority))
-                    {
-                        result = false;
-                        break;
-                    }
-                }
             }
         }
 
diff --git a/source/java/org/alfresco/repo/web/scripts/workflow/WorkflowRestApiTest.java b/source/java/org/alfresco/repo/web/scripts/workflow/WorkflowRestApiTest.java
index f35dfadbf1..c45e4b7b9a 100644
--- a/source/java/org/alfresco/repo/web/scripts/workflow/WorkflowRestApiTest.java
+++ b/source/java/org/alfresco/repo/web/scripts/workflow/WorkflowRestApiTest.java
@@ -606,6 +606,9 @@ public class WorkflowRestApiTest extends BaseWebScriptTest
         // filter by state
         checkFiltering(URL_WORKFLOW_INSTANCES + "?state=active");
         
+        // filter by definition name
+        checkFiltering(URL_WORKFLOW_INSTANCES + "?definitionName=jbpm$wf:adhoc");
+        
         // paging
         int maxItems = 3;        
         for (int skipCount = 0; skipCount < totalItems; skipCount += maxItems)