diff --git a/src/ol/style/RegularShape.js b/src/ol/style/RegularShape.js
index c5b659e3ff..4f38c241b9 100644
--- a/src/ol/style/RegularShape.js
+++ b/src/ol/style/RegularShape.js
@@ -69,7 +69,7 @@ class RegularShape extends ImageStyle {
 
     /**
      * @private
-     * @type {Array<string>}
+     * @type {Array<string|number>}
      */
     this.checksums_ = null;