diff --git a/std/jule/sema/eval.jule b/std/jule/sema/eval.jule
index cf7e1226f..8b685642c 100644
--- a/std/jule/sema/eval.jule
+++ b/std/jule/sema/eval.jule
@@ -4434,6 +4434,7 @@ impl BinaryEval {
         self.eval_const(d)
 
         if d != nil {
+            d.mutable = true
             self.post_eval(d)
         }