diff --git a/AircraftHelicopters/MH53eSeaDragonUnitedStates/MH53EMainRotorHead.x3d b/AircraftHelicopters/MH53eSeaDragonUnitedStates/MH53EMainRotorHead.x3d
index f30715891fc79e16a87f6edff9fd8adf61ae32e3..76271ce035c5d9b8a81f25b966a062d42afd89e6 100644
--- a/AircraftHelicopters/MH53eSeaDragonUnitedStates/MH53EMainRotorHead.x3d
+++ b/AircraftHelicopters/MH53eSeaDragonUnitedStates/MH53EMainRotorHead.x3d
@@ -16,6 +16,7 @@
     <meta content='http://www.ndu.edu/nwc/nwcCLIPART/US_NAVY/Equipment/Helicopters/MH-53E(Sea-Dragon)/MH53ESeaDragon01.jpg' name='Image'/>
     <meta content='X3D-Edit 3.1, https://www.web3d.org/x3d/translation/README.X3D-Edit.html' name='generator'/>
     <meta content='X3D-Edit 3.2, https://savage.nps.edu/X3D-Edit' name='generator'/>
+    <meta content='https://savage.nps.edu/Savage/AircraftHelicopters/MH53ESeaDragonUnitedStates/MH53EMainRotorHead.x3d' name='identifier'/>
     <meta content='../../license.html' name='license'/>
   </head>
   <Scene>