diff --git a/config.sub b/config.sub
index db20d5e37e..8149b79f51 100755
--- a/config.sub
+++ b/config.sub
@@ -657,7 +657,7 @@ case $os in
 	# Each alternative MUST END IN A *, to match a version number.
 	# -sysv* is not here because it comes later, after sysvr4.
 	-gnu* | -bsd* | -mach* | -minix* | -genix* | -ultrix* | -irix* \
-	      | -vms* | -sco* | -esix* | -isc* | -aix* | -sunos | -sunos[3456]* \
+	      | -vms* | -sco* | -esix* | -isc* | -aix* | -sunos | -sunos[34]* \
 	      | -hpux* | -unos* | -osf* | -luna* | -dgux* | -solaris* | -sym* \
 	      | -amigados* | -msdos* | -newsos* | -unicos* | -aof* | -aos* \
 	      | -nindy* | -vxworks* | -ebmon* | -hms* | -mvs* | -clix* \