diff --git a/ChangeLog b/ChangeLog
index 9b13e20..49b141b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2001-01-29  Michael Sokolov  <msokolov@ivan.Harhan.ORG>
+
+	* config.guess: Specifically identify 4.3BSD and 4.3BSD-Reno in
+	the original VAX UNIX detection logic based on the BSD define in
+	<sys/param.h>.
+
 2001-01-17  Pavel Roskin  <proski@gnu.org>
 
 	* config.sub: Removed cases that cannot match. Vendor changed
diff --git a/config.guess b/config.guess
index 32a779b..15e6184 100755
--- a/config.guess
+++ b/config.guess
@@ -1307,11 +1307,24 @@ main ()
 #endif
 
 #if defined (vax)
-#if !defined (ultrix)
-  printf ("vax-dec-bsd\n"); exit (0);
-#else
-  printf ("vax-dec-ultrix\n"); exit (0);
-#endif
+# if !defined (ultrix)
+#  include <sys/param.h>
+#  if defined (BSD)
+#   if BSD == 43
+      printf ("vax-dec-bsd4.3\n"); exit (0);
+#   else
+#    if BSD == 199006
+      printf ("vax-dec-bsd4.3reno\n"); exit (0);
+#    else
+      printf ("vax-dec-bsd\n"); exit (0);
+#    endif
+#   endif
+#  else
+    printf ("vax-dec-bsd\n"); exit (0);
+#  endif
+# else
+    printf ("vax-dec-ultrix\n"); exit (0);
+# endif
 #endif
 
 #if defined (alliant) && defined (i860)