diff --git a/staging/ext-workspace/ext-workspace-v1.xml b/staging/ext-workspace/ext-workspace-v1.xml
index 74074b3..17d4d3d 100644
--- a/staging/ext-workspace/ext-workspace-v1.xml
+++ b/staging/ext-workspace/ext-workspace-v1.xml
@@ -167,7 +167,8 @@
       <description summary="output assigned to workspace group">
         This event is emitted whenever an output is assigned to the workspace
         group or a new `wl_output` object is bound by the client, which was already
-        assigned to this workspace_group.
+        assigned to this workspace_group. Note that an output can be assigned to
+        multiple workspace groups at a time.
       </description>
       <arg name="output" type="object" interface="wl_output"/>
     </event>