diff --git a/runtime/src/main/kotlin/kotlin/String.kt b/runtime/src/main/kotlin/kotlin/String.kt
index 4a10582eac0..28dea1780c5 100644
--- a/runtime/src/main/kotlin/kotlin/String.kt
+++ b/runtime/src/main/kotlin/kotlin/String.kt
@@ -37,7 +37,7 @@ public final class String : Comparable<String>, CharSequence {
 }
 
 // TODO: in big Kotlin this operations are in kotlin.kotlin_builtins.
-private val kNullString = "<null>"
+private val kNullString = "null"
 
 public operator fun kotlin.String?.plus(other: kotlin.Any?): kotlin.String =
     this?.plus(other?.toString() ?: kNullString) ?: other?.toString() ?: kNullString