diff --git a/cmpl_evaluate_expression.go b/cmpl_evaluate_expression.go
index 2769ba1..8586a48 100644
--- a/cmpl_evaluate_expression.go
+++ b/cmpl_evaluate_expression.go
@@ -173,7 +173,11 @@ func (self *_runtime) cmpl_evaluate_nodeBracketExpression(node *_nodeBracketExpr
 	memberValue := member.resolve()
 
 	// TODO Pass in base value as-is, and defer toObject till later?
-	return toValue(newPropertyReference(self, self.toObject(targetValue), memberValue.string(), false, _at(node.idx)))
+	object, err := self.objectCoerce(targetValue)
+	if err != nil {
+		panic(self.panicTypeError("Cannot access member '%s' of %s", memberValue.string(), err.Error(), _at(node.idx)))
+	}
+	return toValue(newPropertyReference(self, object, memberValue.string(), false, _at(node.idx)))
 }
 
 func (self *_runtime) cmpl_evaluate_nodeCallExpression(node *_nodeCallExpression, withArgumentList []interface{}) Value {