diff --git a/src/Web/ActivityPub.hs b/src/Web/ActivityPub.hs
index 4191871..68a54d9 100644
--- a/src/Web/ActivityPub.hs
+++ b/src/Web/ActivityPub.hs
@@ -350,7 +350,7 @@ newtype AdaptAudience = AdaptAudience
     }
 
 instance FromJSON AdaptAudience where
-    parseJSON = parseJSON . adapt
+    parseJSON = fmap AdaptAudience . parseJSON . adapt
         where
         adapt v =
             case v of