diff --git a/src/fragmentarium/ui/SearchForm.tsx b/src/fragmentarium/ui/SearchForm.tsx
index 2b52f5e11..9a8243b53 100644
--- a/src/fragmentarium/ui/SearchForm.tsx
+++ b/src/fragmentarium/ui/SearchForm.tsx
@@ -171,7 +171,7 @@ class SearchForm extends Component<SearchFormProps, State> {
           : '',
         scriptPeriod: state.scriptPeriod,
         genre: state.genre,
-        site: state.site ? state.site.split(' ')[0] : '',
+        site: state.site ? state.site.split(/\[|\]/)[0] : '',
         project: state.project,
       },
       (value) => !value