diff --git a/compiler/testData/codegen/regressions/kt684.jet b/compiler/testData/codegen/regressions/kt684.jet
index 21fb4860c63..90a792730b5 100644
--- a/compiler/testData/codegen/regressions/kt684.jet
+++ b/compiler/testData/codegen/regressions/kt684.jet
@@ -2,7 +2,7 @@ fun escapeChar(c : Char) : String? = when (c) {
   '\\' -> "\\\\"
   '\n' -> "\\n"
   '"'  -> "\\\""
-  else -> String.valueOf(c)
+  else -> "" + c
 }
 
 fun String.escape(i : Int = 0, result : String = "") : String =
@@ -26,4 +26,4 @@ fun box() : String {
   System.out?.println("  val s = \"" + s.escape() + "\";");
   System.out?.println(s);
   return "OK"
-}
\ No newline at end of file
+}