diff --git a/src/mergerfs_webui.cpp b/src/mergerfs_webui.cpp
index 05f377c9..810dd85a 100644
--- a/src/mergerfs_webui.cpp
+++ b/src/mergerfs_webui.cpp
@@ -162,6 +162,7 @@ _get_mounts(const httplib::Request &req_,
             httplib::Response      &res_)
 {
   json j;
+  std::string type;
   fs::MountVec mounts;
 
   fs::mounts(mounts);