diff --git a/proposals/1772-groups-as-rooms.md b/proposals/1772-groups-as-rooms.md
index e25735bc0..fbdaa4859 100644
--- a/proposals/1772-groups-as-rooms.md
+++ b/proposals/1772-groups-as-rooms.md
@@ -635,7 +635,7 @@ These dependencies are shared with profiles-as-rooms
 ## Tradeoffs
 
 * If the membership of a space would be large (for example: an organisation of
-  several thousand people), this membership has to copied entirely into the
+  several thousand people), this membership has to be copied entirely into the
   room, rather than querying/searching incrementally.
 
 * If the membership list is based on an external service such as LDAP, it is