diff --git a/src/vscode-dts/vscode.d.ts b/src/vscode-dts/vscode.d.ts
index 180f9bbcaa119..3c2266e0e8d70 100644
--- a/src/vscode-dts/vscode.d.ts
+++ b/src/vscode-dts/vscode.d.ts
@@ -20121,7 +20121,7 @@ declare module 'vscode' {
 		/**
 		 * A JSON schema for the input this tool accepts.
 		 */
-		inputSchema?: object;
+		inputSchema?: object | undefined;
 	}
 
 	/**