diff --git a/src/compiler/compile/nodes/shared/Expression.ts b/src/compiler/compile/nodes/shared/Expression.ts
index 3a85bf35c8..65b10d04c8 100644
--- a/src/compiler/compile/nodes/shared/Expression.ts
+++ b/src/compiler/compile/nodes/shared/Expression.ts
@@ -24,7 +24,7 @@ type Owner = INode;
 const regex_contains_term_function_expression = /FunctionExpression/;
 
 export default class Expression {
-	type: 'Expression' = 'Expression';
+	type: 'Expression' = 'Expression' as const;
 	component: Component;
 	owner: Owner;
 	node: Node;