diff --git a/src/ScriptEditor/NetscriptDefinitions.d.ts b/src/ScriptEditor/NetscriptDefinitions.d.ts
index bd0dbd032..1ec40d9e3 100644
--- a/src/ScriptEditor/NetscriptDefinitions.d.ts
+++ b/src/ScriptEditor/NetscriptDefinitions.d.ts
@@ -1994,7 +1994,7 @@ export interface Singularity {
    *
    * @returns True if the player is focused.
    */
-   isFocused(): void;
+   isFocused(): boolean;
 
    /**
     * SF4.2 - Set the players focus.