diff --git a/src/ScriptEditor/NetscriptDefinitions.d.ts b/src/ScriptEditor/NetscriptDefinitions.d.ts
index 68b1c94c2..0601d59d5 100644
--- a/src/ScriptEditor/NetscriptDefinitions.d.ts
+++ b/src/ScriptEditor/NetscriptDefinitions.d.ts
@@ -5258,7 +5258,7 @@ export interface NS extends Singularity {
    * @param format - Formatter.
    * @returns Formated number.
    */
-  nFormat(n: number, format: string): number;
+  nFormat(n: number, format: string): string;
 
   /**
    * Format time to readable string