diff --git a/core/src/main/resources/hudson/tasks/ArtifactArchiver/help-artifacts.html b/core/src/main/resources/hudson/tasks/ArtifactArchiver/help-artifacts.html
index d4cc5236f504..215d0ba8df4e 100644
--- a/core/src/main/resources/hudson/tasks/ArtifactArchiver/help-artifacts.html
+++ b/core/src/main/resources/hudson/tasks/ArtifactArchiver/help-artifacts.html
@@ -1,7 +1,8 @@
 <div>
    You can use wildcards like 'module/dist/**/*.zip'.
    See <a href='http://ant.apache.org/manual/Types/fileset.html'>
-   the includes attribute of Ant fileset</a> for the exact format.
+   the includes attribute of Ant fileset</a> for the exact format
+   -- except that <tt>","</tt> (<em>comma</em>) is the only supported separator.
    The base directory is <a href='ws/'>the workspace</a>.
    You can only archive files that are located in your workspace.
-</div>
\ No newline at end of file
+</div>