diff --git a/ChangeLog b/ChangeLog
index d96c6c4..9233ca1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2018-01-14  Ben Elliston  <bje@gnu.org>
+
+	* config.sub (os): Remove overlapping pattern -svr4*.
+
 2018-01-14  Ben Elliston  <bje@gnu.org>
 
 	* config.sub (maybe_os): Remove duplicate pattern -hms*.
diff --git a/config.sub b/config.sub
index 2ee4044..e464057 100755
--- a/config.sub
+++ b/config.sub
@@ -1349,9 +1349,6 @@ case $os in
 	-solaris)
 		os=-solaris2
 		;;
-	-svr4*)
-		os=-sysv4
-		;;
 	-unixware*)
 		os=-sysv4.2uw
 		;;
@@ -1479,7 +1476,7 @@ case $os in
 	-oss*)
 		os=-sysv3
 		;;
-	-svr4)
+	-svr4*)
 		os=-sysv4
 		;;
 	-svr3)