diff --git a/src/mergerfs_webui.cpp b/src/mergerfs_webui.cpp
index c4100e6b..48cf9082 100644
--- a/src/mergerfs_webui.cpp
+++ b/src/mergerfs_webui.cpp
@@ -175,7 +175,7 @@ _get_mounts_mergerfs(const httplib::Request &req_,
       j.push_back(mount.type);
     }
 
-  res_.set_content(j.dump(),
+  res_.set_content(json_array.dump(),
                    "application/json");
 }