diff --git a/src/ol/control/Attribution.js b/src/ol/control/Attribution.js
index b10b366259..03de9d15f6 100644
--- a/src/ol/control/Attribution.js
+++ b/src/ol/control/Attribution.js
@@ -110,7 +110,7 @@ class Attribution extends Control {
     const collapseClassName =
       options.collapseClassName !== undefined
         ? options.collapseClassName
-        : className + '-collpase';
+        : className + '-collapse';
 
     if (typeof collapseLabel === 'string') {
       /**