diff --git a/client/modules/datafiles/src/nees/NeesDetails.tsx b/client/modules/datafiles/src/nees/NeesDetails.tsx
index 2ceef5f2b..c1f057af5 100644
--- a/client/modules/datafiles/src/nees/NeesDetails.tsx
+++ b/client/modules/datafiles/src/nees/NeesDetails.tsx
@@ -58,7 +58,9 @@ export const NeesDetails: React.FC<{ neesId: string }> = ({ neesId }) => {
   const neesExperiments = data?.metadata.experiments;
   const numDOIs = neesExperiments?.filter((exp) => !!exp.doi).length || 0;
   const routeParams = useParams();
-  const path = routeParams.path ?? data?.path;
+  let path = routeParams.path ?? data?.path;
+  // Fix for legacy URLs. /Experiment-1 -> /NEES-001.groups/Experiment-1
+  if (path) path = path.includes(neesId) ? path : `/${neesId}.groups/${path}`;
 
   const [activeTab, setActiveTab] = useState<string>('files');
   useEffect(() => setActiveTab('files'), [path]);