diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 2909ce10d..fb4c78d4d 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,8 @@
+2008-12-15  Corinna Vinschen  <corinna@vinschen.de>
+
+	* syscalls.cc (gen_full_path_at): Use isabspath instead of isdirsep
+	to recognize absolute path.
+
 2008-12-15  Corinna Vinschen  <corinna@vinschen.de>
 
 	* sec_auth.cc (open_local_policy): Set lsa handle to
diff --git a/winsup/cygwin/syscalls.cc b/winsup/cygwin/syscalls.cc
index 5b632f03d..7100ce36b 100644
--- a/winsup/cygwin/syscalls.cc
+++ b/winsup/cygwin/syscalls.cc
@@ -3610,7 +3610,7 @@ gen_full_path_at (char *path_ret, int dirfd, const char *pathname,
 	  return -1;
 	}
     }
-  if (pathname && isdirsep (*pathname))
+  if (pathname && isabspath (pathname))
     stpcpy (path_ret, pathname);
   else
     {