diff --git a/ActivityStreams.md b/ActivityStreams.md
index e197d3f..307eb36 100644
--- a/ActivityStreams.md
+++ b/ActivityStreams.md
@@ -16,7 +16,7 @@ See http://activitystrea.ms/head/activity-schema.html
 * Description: attend an event
 
 ## ACTIVITY_ATTENDNO
-* http:http://purl.org/zot/activity/attendno
+* http://purl.org/zot/activity/attendno
 * Description: don't attend an event
 
 ## ACTIVITY_ATTENDMAYBE