diff --git a/ChangeLog b/ChangeLog
index c22365e..c963b62 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2018-01-13  Ben Elliston  <bje@gnu.org>
+
+	* config.sub (maybe_os): Remove duplicate wasm32 case as it is
+	matched above. Found by Shellcheck.
+
 2018-01-13  Ben Elliston  <bje@gnu.org>
 
 	* config.sub (maybe_os): Remove duplicate -osfrose* and -osf*
diff --git a/config.sub b/config.sub
index dd9f442..b98be14 100755
--- a/config.sub
+++ b/config.sub
@@ -1244,9 +1244,6 @@ case $basic_machine in
 		basic_machine=a29k-wrs
 		os=-vxworks
 		;;
-	wasm32)
-		basic_machine=wasm32-unknown
-		;;
 	w65*)
 		basic_machine=w65-wdc
 		os=-none