1 files changed, 7 insertions, 1 deletions

diff --git a/config.sub b/config.sub
index e5f8db57ebc..a5095547d17 100755
--- a/config.sub
+++ b/config.sub
@@ -170,7 +170,13 @@ case $basic_machine in
                 ;;
         iris | iris4d)
                 basic_machine=mips-sgi
-                os=-irix
+                case $os in
+                    -irix*)
+                        ;;
+                    *)
+                        os=-irix4
+                        ;;
+                esac
                 ;;
         news | news700 | news800 | news900)
                 basic_machine=m68k-sony