diff --git a/Src/Myc.Core.Lazy.pas b/Src/Myc.Core.Lazy.pas
index d0ca058..5873ac0 100644
--- a/Src/Myc.Core.Lazy.pas
+++ b/Src/Myc.Core.Lazy.pas
@@ -259,7 +259,7 @@ begin
     Lock;
     try
         Assert(FMutable.Writer <> nil);
-        FMutable.Writer.Exchange(Value);
+        Result := FMutable.Writer.Exchange(Value);
     finally
         Release;
     end;