diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 97366b03b..c8789b7f6 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,8 @@
+Thu Apr 19  9:40:00 2001  Corinna Vinschen <corinna@vinschen.de>
+
+	* mmap.cc (mmap): Drop usage of the same memory area if the same
+	region of the same file is mapped twice.
+
 Wed Apr 18 16:53:54 2001  Christopher Faylor <cgf@cygnus.com>
 
 	Throughout, change fdtab references to cygheap->fdtab.
diff --git a/winsup/cygwin/mmap.cc b/winsup/cygwin/mmap.cc
index 97ee24c0c..78765a1bc 100644
--- a/winsup/cygwin/mmap.cc
+++ b/winsup/cygwin/mmap.cc
@@ -499,9 +499,9 @@ mmap (caddr_t addr, size_t len, int prot, int flags, int fd, off_t off)
   list *l = mmapped_areas->get_list_by_fd (fd);
 
   /* First check if this mapping matches into the chunk of another
-     already performed mapping. Only valid for MAP_SHARED and for
-     MAP_ANON in a special case of MAP_PRIVATE. */
-  if (l && ((flags & MAP_SHARED) || (fd == -1 && off == 0)))
+     already performed mapping. Only valid for MAP_ANON in a special
+     case of MAP_PRIVATE. */
+  if (l && fd == -1 && off == 0)
     {
       mmap_record *rec;
       if ((rec = l->match (off, len)) != NULL)