diff --git a/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2.cljc b/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2.cljc
index 21807d1..872d692 100644
--- a/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2.cljc
+++ b/src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2.cljc
@@ -47,11 +47,10 @@
    ::Activity))
 
 ;http://www.w3.org/ns/activitystreams#attachment
-; TODO: Why do we need to model this? Is this necessary for a Like-Activity?
 (s/def ::attachment
   (s/and 
-   ::owl/Class
    ::owl/ObjectProperty
+   ::owl/Class
    ::Object
    ::Link))
 
diff --git a/src/test/cljc/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2_test.cljc b/src/test/cljc/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2_test.cljc
index 136504f..29fdd13 100644
--- a/src/test/cljc/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2_test.cljc
+++ b/src/test/cljc/org/domaindrivenarchitecture/activity_pub_poc/activitystreams2_test.cljc
@@ -29,6 +29,8 @@
   (is (not (s/valid? ::sut/result 47))))
 
 
-;(deftest attachment-test
-;  (is (s/valid? ::sut/attachment))
-;  )
\ No newline at end of file
+(deftest attachment-test
+  (is (s/valid? ::sut/attachment
+                [{:type "Image",
+                  :content "This is what he looks like.",
+                  :url "http://example.org/cat.jpeg"}])))