diff --git a/ChangeLog b/ChangeLog
index 47378ac..c22365e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2018-01-13  Ben Elliston  <bje@gnu.org>
+
+	* config.sub (maybe_os): Remove duplicate -osfrose* and -osf*
+	cases as these are matched above by -osf*. Found by Shellcheck.
+
 2018-01-13  Ben Elliston  <bje@gnu.org>
 
 	* config.sub (maybe_os): Remove second and duplicate *-xenix case
diff --git a/config.sub b/config.sub
index d10ced8..dd9f442 100755
--- a/config.sub
+++ b/config.sub
@@ -1461,12 +1461,6 @@ case $os in
 	-wince*)
 		os=-wince
 		;;
-	-osfrose*)
-		os=-osfrose
-		;;
-	-osf*)
-		os=-osf
-		;;
 	-utek*)
 		os=-bsd
 		;;