diff --git a/demo/issue-77b/index.html b/demo/issue-77b/index.html
index 1b4b500..f9df672 100644
--- a/demo/issue-77b/index.html
+++ b/demo/issue-77b/index.html
@@ -22,7 +22,7 @@
       }
 
       btnBase.addEventListener(`click`, () => enableBaseLine());
-      btnPres.addEventListener(`click`, () => enablePressHold());
+      btnPress.addEventListener(`click`, () => enablePressHold());
       btnPress5.addEventListener(`click`, () => enablePressHold5());
 
       document.addEventListener(`dragover`, (e) => e.preventDefault());