diff --git a/compiler/testData/codegen/boxWithStdlib/regressions/kt344.kt b/compiler/testData/codegen/boxWithStdlib/regressions/kt344.kt
index 89725ca7f27..a83fbaf9354 100644
--- a/compiler/testData/codegen/boxWithStdlib/regressions/kt344.kt
+++ b/compiler/testData/codegen/boxWithStdlib/regressions/kt344.kt
@@ -92,7 +92,7 @@ fun t6() : Boolean {
     val y = x + 22
     val foo = {
         x = (x + 20.toByte() + y).toByte()
-        x += 2
+        x = (x + 2).toByte()
         x--
         Unit
     }