diff --git a/mystic/bbs_common.pas b/mystic/bbs_common.pas
index cb88ce7..84d19b6 100644
--- a/mystic/bbs_common.pas
+++ b/mystic/bbs_common.pas
@@ -170,6 +170,8 @@ End;
 
 Function ShellDOS (ExecPath: String; Command: String) : LongInt;
 Begin
+  Session.io.BufFlush;
+
   {$IFDEF WINDOWS}
     ExecInheritsHandles := True;
   {$ENDIF}