diff --git a/XenModel/Actions/VM/ExportVmAction.cs b/XenModel/Actions/VM/ExportVmAction.cs
index c38cb5df2..e965c5b65 100644
--- a/XenModel/Actions/VM/ExportVmAction.cs
+++ b/XenModel/Actions/VM/ExportVmAction.cs
@@ -131,7 +131,7 @@ namespace XenAdmin.Actions
                     // which probably means there was an exception in the GUI code before the
                     // action got going. Kill the task so that we don't block forever on
                     // taskThread.Join(). Brought to light by CA-11100.
-                    XenAPI.Task.destroy(this.Session, this.RelatedTask.opaque_ref);
+                    DestroyTask();
                 }
                 // Test for null: don't overwrite a previous exception
                 if (_exception == null)
diff --git a/XenModel/WLB/WlbReportAction.cs b/XenModel/WLB/WlbReportAction.cs
index f442662c4..df8c1c330 100644
--- a/XenModel/WLB/WlbReportAction.cs
+++ b/XenModel/WLB/WlbReportAction.cs
@@ -117,7 +117,7 @@ namespace XenAdmin.Actions.Wlb
                     // which probably means there was an exception in the GUI code before the
                     // action got going. Kill the task so that we don't block forever on
                     // taskThread.Join(). Brought to light by CA-11100.
-                    XenAPI.Task.destroy(Session, RelatedTask.opaque_ref);
+                    DestroyTask();
                 }
                 if (exception == null)
                     exception = e;