diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 5000d636a..1c51cd3cd 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,8 @@
+2009-10-12  Corinna Vinschen  <corinna@vinschen.de>
+
+	* external.cc (cygwin_internal): Return 0 in CW_SET_DOS_FILE_WARNING
+	and CW_SETERRNO cases.
+
 2009-10-12  Corinna Vinschen  <corinna@vinschen.de>
 
 	* fhandler_disk_file.cc (fhandler_disk_file::link): Only append .lnk
diff --git a/winsup/cygwin/external.cc b/winsup/cygwin/external.cc
index 38b8c71e2..23e108804 100644
--- a/winsup/cygwin/external.cc
+++ b/winsup/cygwin/external.cc
@@ -393,6 +393,7 @@ cygwin_internal (cygwin_getinfo_types t, ...)
 	{
 	  extern bool dos_file_warning;
 	  dos_file_warning = va_arg (arg, int);
+	  return 0;
 	}
 	break;
       case CW_SET_PRIV_KEY:
@@ -405,6 +406,7 @@ cygwin_internal (cygwin_getinfo_types t, ...)
 	  const char *file = va_arg (arg, const char *);
 	  int line = va_arg (arg, int);
 	  seterrno(file, line);
+	  return 0;
 	}
 	break;
       case CW_EXIT_PROCESS: