diff --git a/wv-window.rkt b/wv-window.rkt
index ce8d108..300c8d0 100644
--- a/wv-window.rkt
+++ b/wv-window.rkt
@@ -385,8 +385,8 @@
         )
       )
 
-    (define/public (set-attr! selector key value)
-      (webview-set-attr! wv selector key value))
+    (define/public (set-attr! selector key-values)
+      (webview-set-attr! wv selector key-values)
 
     (define/public (set-title! title)
       (webview-set-title! wv title))