diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 247ef594f..1b4ab11d6 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,5 +1,11 @@
+Mon Mar 26 18:48:00 2001  Corinna Vinschen <corinna@vinschen.de>
+
+	* mmap.cc (mmap): Outflank copy-on-write problem on 9x by
+	setting access mode to FILE_MAP_READ when read access is requested.
+
 Sun Mar 25 20:12:21 2001  Christopher Faylor <cgf@cygnus.com>
 
+
 	* dlfcn.cc (check_access): Eliminate.
 	(check_path_access): Use passed in path_conv buf.
 	(get_full_path_of_dll): Use passed in name buf to avoid a static.  Rip
diff --git a/winsup/cygwin/mmap.cc b/winsup/cygwin/mmap.cc
index e1fc2d621..9c9c75c50 100644
--- a/winsup/cygwin/mmap.cc
+++ b/winsup/cygwin/mmap.cc
@@ -380,7 +380,10 @@ mmap (caddr_t addr, size_t len, int prot, int flags, int fd, off_t off)
     }
 
   DWORD access = (prot & PROT_WRITE) ? FILE_MAP_WRITE : FILE_MAP_READ;
-  if (flags & MAP_PRIVATE)
+  /* copy-on-write doesn't work correctly on 9x. To have at least read
+     access we use *READ mapping on 9x when appropriate. It will still
+     fail when needing write access, though. */
+  if ((flags & MAP_PRIVATE) && (os_being_run == winNT || !(prot & PROT_READ)))
     access = FILE_MAP_COPY;
 
   SetResourceLock(LOCK_MMAP_LIST,READ_LOCK|WRITE_LOCK," mmap");