diff --git a/docs_v1.0/doc_wasm/index.html b/docs_v1.0/doc_wasm/index.html
index 27bde6e..5b274ca 100644
--- a/docs_v1.0/doc_wasm/index.html
+++ b/docs_v1.0/doc_wasm/index.html
@@ -121,7 +121,7 @@ async function loadDoc(name) {
   el.innerHTML = '<p>Loading...</p>';
   try {
     const resp = await fetch('/doc-wasm/modules/' + name + '.md');
-    if (!resp.ok) throw new Error('HTTP ' + resp.status);
+    if (!resp.ok) throw new Error('HTTP ' + resp.status + ' fetching /doc-wasm/modules/' + name + '.md');
     const md = await resp.text();
     if (!wasm_exports) throw new Error('WASM not loaded');
     el.innerHTML = md2html(md);