diff --git a/src/client/scripts/aoiscript/evaluator.ts b/src/client/scripts/aoiscript/evaluator.ts
index 40e62210b..cd488aeda 100644
--- a/src/client/scripts/aoiscript/evaluator.ts
+++ b/src/client/scripts/aoiscript/evaluator.ts
@@ -17,7 +17,7 @@ export class ASEvaluator {
 	private variables: Variable[];
 	private pageVars: PageVar[];
 	private envVars: Record<keyof typeof envVarsDef, any>;
-	public aiscript: AiScript | undefined;
+	public aiscript?: AiScript;
 	private pageVarUpdatedCallback;
 
 	private opts: {