diff --git a/README.md b/README.md
index e668379f..1509b4d0 100644
--- a/README.md
+++ b/README.md
@@ -79,7 +79,7 @@ check out our [contribution policy].
   ```rust
   #[wasm_bindgen]
   extern {
-      fn alert(s: &str);
+      pub fn alert(s: &str);
   }
 
   #[wasm_bindgen]