diff --git a/projects/common/src/fm/services/codelistitem.service.ts b/projects/common/src/fm/services/codelistitem.service.ts
index 33040d1..00cabc1 100644
--- a/projects/common/src/fm/services/codelistitem.service.ts
+++ b/projects/common/src/fm/services/codelistitem.service.ts
@@ -17,7 +17,7 @@ export class CodeListItemService {
 
   getCodeListItems(codelist: string[], codegroup?: string, dataFilter?: any): Observable<ICodeListItem[]> {
     var params = new HttpParams();
-    params = params.append("cl", codelist.join(","));
+    params = params.append("cl", codelist);
     if (codegroup) params = params.append("g", codegroup);
     if (dataFilter) params = params.append("df", dataFilter);
     return this.httpClient.get<ICodeListItem[]>(`${this.ApiEndpoint()}/api/v1/codelistitems/`, { params: params });