diff --git a/src/@prototypes/map.ts b/src/@prototypes/map.ts
index 40d4d20d..50e85d48 100644
--- a/src/@prototypes/map.ts
+++ b/src/@prototypes/map.ts
@@ -1,14 +1,12 @@
 Map.prototype.getOrInsert ??= function (key, defaultValue) {
-  const value = this.get(key);
-  if (value !== undefined) return value;
+  if (this.has(key)) return this.get(key);
 
   this.set(key, defaultValue);
   return defaultValue;
 };
 
 Map.prototype.getOrInsertComputed ??= function (key, callback) {
-  const value = this.get(key);
-  if (value !== undefined) return value;
+  if (this.has(key)) return this.get(key);
 
   const defaultValue = callback(key);
   this.set(key, defaultValue);