diff --git a/apps/emqttd/src/emqttd.erl b/apps/emqttd/src/emqttd.erl
index c14bef228..cbec8e384 100644
--- a/apps/emqttd/src/emqttd.erl
+++ b/apps/emqttd/src/emqttd.erl
@@ -162,7 +162,7 @@ loaded_plugins() ->
 -spec unload_all_plugins() -> [{App :: atom(), ok | {error, any()}}].
 unload_all_plugins() ->
     PluginApps = application:get_env(emqttd, plugins, []),
-    [{App, unload_plugin(App)} || {App, _Env} <- PluginApps].
+    [{App, unload_plugin(App)} || App <- PluginApps].
 
 
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