diff --git a/lib/delphi/src/Thrift.Transport.pas b/lib/delphi/src/Thrift.Transport.pas
index 74afb52..9fd52a8 100644
--- a/lib/delphi/src/Thrift.Transport.pas
+++ b/lib/delphi/src/Thrift.Transport.pas
@@ -1340,7 +1340,7 @@
       else wfd := WaitForData( SLEEP_TIME, pDest, count, wsaError, nBytes);
 
       case wfd of
-        TWaitForData.wfd_Error    :  Exit(0);
+        TWaitForData.wfd_Error    :  Exit;
         TWaitForData.wfd_HaveData :  Break;
         TWaitForData.wfd_Timeout  :  begin
           if (FTimeout > 0)