diff --git a/src/types/YMap.js b/src/types/YMap.js
index 612bde0c..cb9fee4f 100644
--- a/src/types/YMap.js
+++ b/src/types/YMap.js
@@ -129,7 +129,7 @@ export class YMap extends AbstractType {
    *
    * @return {number}
    */
-  get size () {
+  size () {
     return [...createMapIterator(this._map)].length
   }