diff --git a/client/src/pages/DsiOpex.tsx b/client/src/pages/DsiOpex.tsx
index 7c6d019..62f3273 100644
--- a/client/src/pages/DsiOpex.tsx
+++ b/client/src/pages/DsiOpex.tsx
@@ -699,8 +699,10 @@ export default function DsiOpex() {
 
   const filteredEtabs = useMemo(() => {
     return etablissementsRecalcules.filter(e => {
-      if (search && !e.nom.toLowerCase().includes(search.toLowerCase()) &&
-          !e.code.toLowerCase().includes(search.toLowerCase())) return false;
+      const nom = typeof e.nom === 'string' ? e.nom : String(e.nom ?? '');
+      const code = typeof e.code === 'string' ? e.code : String(e.code ?? '');
+      if (search && !nom.toLowerCase().includes(search.toLowerCase()) &&
+          !code.toLowerCase().includes(search.toLowerCase())) return false;
       return true;
     });
   }, [etablissementsRecalcules, search]);
@@ -708,7 +710,11 @@ export default function DsiOpex() {
   const sortedEtabs = useMemo(() => {
     const arr = [...filteredEtabs];
     if (sortCol === 'total') arr.sort((a, b) => sortDir === 'asc' ? a.total - b.total : b.total - a.total);
-    else if (sortCol === 'nom') arr.sort((a, b) => sortDir === 'asc' ? a.nom.localeCompare(b.nom) : b.nom.localeCompare(a.nom));
+    else if (sortCol === 'nom') arr.sort((a, b) => {
+      const na = typeof a.nom === 'string' ? a.nom : String(a.nom ?? '');
+      const nb = typeof b.nom === 'string' ? b.nom : String(b.nom ?? '');
+      return sortDir === 'asc' ? na.localeCompare(nb) : nb.localeCompare(na);
+    });
     return arr;
   }, [filteredEtabs, sortCol, sortDir]);