diff --git a/mercurial/commands.py b/mercurial/commands.py
--- a/mercurial/commands.py
+++ b/mercurial/commands.py
@@ -5249,10 +5249,9 @@ def tip(ui, repo, **opts):
      _('update to new branch head if changesets were unbundled'))],
     _('[-u] FILE...'))
 def unbundle(ui, repo, fname1, *fnames, **opts):
-    """apply one or more changegroup files
-
-    Apply one or more compressed changegroup files generated by the
-    bundle command.
+    """apply one or more bundle files
+
+    Apply one or more bundle files generated by :hg:`bundle`.
 
     Returns 0 on success, 1 if an update has unresolved files.
     """
diff --git a/tests/test-globalopts.t b/tests/test-globalopts.t
--- a/tests/test-globalopts.t
+++ b/tests/test-globalopts.t
@@ -333,7 +333,7 @@ Testing -h/--help:
    summary       summarize working directory state
    tag           add one or more tags for the current or given revision
    tags          list repository tags
-   unbundle      apply one or more changegroup files
+   unbundle      apply one or more bundle files
    update        update working directory (or switch revisions)
    verify        verify the integrity of the repository
    version       output version and copyright information
@@ -417,7 +417,7 @@ Testing -h/--help:
    summary       summarize working directory state
    tag           add one or more tags for the current or given revision
    tags          list repository tags
-   unbundle      apply one or more changegroup files
+   unbundle      apply one or more bundle files
    update        update working directory (or switch revisions)
    verify        verify the integrity of the repository
    version       output version and copyright information
diff --git a/tests/test-help.t b/tests/test-help.t
--- a/tests/test-help.t
+++ b/tests/test-help.t
@@ -95,7 +95,7 @@ Short help:
    summary       summarize working directory state
    tag           add one or more tags for the current or given revision
    tags          list repository tags
-   unbundle      apply one or more changegroup files
+   unbundle      apply one or more bundle files
    update        update working directory (or switch revisions)
    verify        verify the integrity of the repository
    version       output version and copyright information
@@ -173,7 +173,7 @@ Short help:
    summary       summarize working directory state
    tag           add one or more tags for the current or given revision
    tags          list repository tags
-   unbundle      apply one or more changegroup files
+   unbundle      apply one or more bundle files
    update        update working directory (or switch revisions)
    verify        verify the integrity of the repository
    version       output version and copyright information
@@ -818,7 +818,7 @@ Test that default list of commands omits
    summary       summarize working directory state
    tag           add one or more tags for the current or given revision
    tags          list repository tags
-   unbundle      apply one or more changegroup files
+   unbundle      apply one or more bundle files
    update        update working directory (or switch revisions)
    verify        verify the integrity of the repository
    version       output version and copyright information
@@ -2428,7 +2428,7 @@ Dish up an empty repo; serve it cold.
   unbundle
   </a>
   </td><td>
-  apply one or more changegroup files
+  apply one or more bundle files
   </td></tr>
   <tr><td>
   <a href="/help/verify">
diff --git a/tests/test-hgweb-json.t b/tests/test-hgweb-json.t
--- a/tests/test-hgweb-json.t
+++ b/tests/test-hgweb-json.t
@@ -1535,7 +1535,7 @@ help/ shows help topics
         "topic": "tags"
       },
       {
-        "summary": "apply one or more changegroup files",
+        "summary": "apply one or more bundle files",
         "topic": "unbundle"
       },
       {