diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 3f80bc7f0..2b8553b3a 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,8 @@
+2007-03-30  Christopher Faylor  <me@cgf.cx>
+
+	* external.cc (cygwin_internal): Implement CW_SET_DOS_FILE_WARNING.
+	* include/sys/cygwin.h: Define CW_SET_DOS_FILE_WARNING.
+
 2007-03-29  Corinna Vinschen  <corinna@vinschen.de>
 
 	* cygheap.cc (cygheap_init): Fix formatting.  Remove comment.  Set
diff --git a/winsup/cygwin/external.cc b/winsup/cygwin/external.cc
index 4cc539e6a..b6b64f14d 100644
--- a/winsup/cygwin/external.cc
+++ b/winsup/cygwin/external.cc
@@ -350,6 +350,13 @@ cygwin_internal (cygwin_getinfo_types t, ...)
 	return 0;
       case CW_CYGTLS_PADSIZE:
 	return CYGTLS_PADSIZE;
+      case CW_SET_DOS_FILE_WARNING:
+	{
+	  extern bool dos_file_warning;
+	  dos_file_warning = va_arg (arg, int);
+	}
+	break;
+
       default:
 	break;
     }
diff --git a/winsup/cygwin/include/sys/cygwin.h b/winsup/cygwin/include/sys/cygwin.h
index 26bfee086..7cc36c434 100644
--- a/winsup/cygwin/include/sys/cygwin.h
+++ b/winsup/cygwin/include/sys/cygwin.h
@@ -87,7 +87,8 @@ typedef enum
     CW_ENVP,
     CW_DEBUG_SELF,
     CW_SYNC_WINENV,
-    CW_CYGTLS_PADSIZE
+    CW_CYGTLS_PADSIZE,
+    CW_SET_DOS_FILE_WARNING
   } cygwin_getinfo_types;
 
 #define CW_NEXTPID	0x80000000	/* or with pid to get next one */
diff --git a/winsup/utils/ChangeLog b/winsup/utils/ChangeLog
index 9d4d88245..8407fb304 100644
--- a/winsup/utils/ChangeLog
+++ b/winsup/utils/ChangeLog
@@ -1,3 +1,8 @@
+2007-03-30  Christopher Faylor  <me@cgf.cx>
+
+	* mount.cc (main): Turn dos file warnings off since we know what we're
+	doing.
+
 2007-02-22  Corinna Vinschen  <corinna@vinschen.de>
 
 	* ipcs.c (_POSIX2_LINE_MAX): Drop definition.
diff --git a/winsup/utils/mount.cc b/winsup/utils/mount.cc
index ec2d9b63e..ae447112c 100644
--- a/winsup/utils/mount.cc
+++ b/winsup/utils/mount.cc
@@ -348,6 +348,8 @@ main (int argc, char **argv)
       exit (1);
     }
 
+  cygwin_internal (CW_SET_DOS_FILE_WARNING, false);
+
   argc--;
   switch (do_what)
     {