diff --git a/gcc/config.sub b/gcc/config.sub
index 3d6dc83fcc91511c3881d4dd92ec6a8119cbf5d7..e2d8d6fe139ef94f26e1270a68cf2bed96b3a5da 100755
--- a/gcc/config.sub
+++ b/gcc/config.sub
@@ -594,6 +594,9 @@ case $basic_machine in
 	m88k-omron*)
 		os=-luna
 		;;
+	*-sequent)
+		os=-bsd
+		;;
 	*-crds)
 		os=-unos
 		;;