diff --git a/src/mergerfs_webui.cpp b/src/mergerfs_webui.cpp
index 35068735..c6deecc0 100644
--- a/src/mergerfs_webui.cpp
+++ b/src/mergerfs_webui.cpp
@@ -183,10 +183,6 @@ void
 _get_kvs(const httplib::Request &req_,
          httplib::Response      &res_)
 {
-  json j;
-  std::string mount;
-  std::map<std::string,std::string> kvs;
-
   if(not req_.has_param("mount"))
     {
       res_.status = 400;
@@ -194,6 +190,10 @@ _get_kvs(const httplib::Request &req_,
       return;
     }
 
+  json j;
+  std::string mount;
+  std::map<std::string,std::string> kvs;
+
   mount = req_.get_param_value("mount");
 
   mergerfs::api::get_kvs(mount,&kvs);