diff --git a/src/compiler/compile/utils/get_object.ts b/src/compiler/compile/utils/get_object.ts
index 75b1964a13..10760740a0 100644
--- a/src/compiler/compile/utils/get_object.ts
+++ b/src/compiler/compile/utils/get_object.ts
@@ -1,28 +1,13 @@
 import {
 	Node,
 	Identifier,
-	ArrayExpression,
-	ObjectExpression,
-	ThisExpression,
-	ObjectPattern,
-	ArrayPattern,
-	Literal,
 } from "estree";
 
-type ObjectType =
-	| Identifier
-	| ThisExpression
-	| ArrayExpression
-	| ObjectExpression
-	| ArrayPattern
-	| ObjectPattern
-	| Literal;
-
-export default function get_object(node: Node): ObjectType {
+export default function get_object(node: Node): Identifier {
 	while (true) {
 		if (node.type === "MemberExpression") node = node.object;
 		else if (node.type === "CallExpression") node = node.callee;
 		else break;
 	}
-	return node as ObjectType;
+	return node as Identifier;
 }
diff --git a/test/runtime/samples/binding-input-text-map/_config.js b/test/runtime/samples/binding-input-text-map/_config.js
index 8c58a84d5c..e0e25d419c 100644
--- a/test/runtime/samples/binding-input-text-map/_config.js
+++ b/test/runtime/samples/binding-input-text-map/_config.js
@@ -20,5 +20,9 @@ export default {
 
 		assert.equal(input.value, '42');
 		assert.equal(component.map.get(component.id).x, '42')
+
+		component.map.set(3, { x: 7, y: 8 });
+		component.id = 3;
+		assert.equal(input.value, '7');
 	}
 };