diff --git a/etc/ERC-NEWS b/etc/ERC-NEWS
index b7b49956d06..9554eaed412 100644
--- a/etc/ERC-NEWS
+++ b/etc/ERC-NEWS
@@ -49,6 +49,8 @@ speaker names, with the latter option also gaining 'erc-notice-face'.
 This was done to provide a more frequent and practical indication of
 channel activity in keeping with the module's original design.
 
+** Command 'erc-track-clear' clears the mode-line activity indicator.
+
 ** An arguably less distracting 'erc-nicks-track-faces' variant.
 Setting this option to t tells the 'track' module to have the mode-line
 indicator stick with the most recent speaker's face, even when they're
diff --git a/lisp/erc/erc-track.el b/lisp/erc/erc-track.el
index 97fb7e726bd..fac0269f9e8 100644
--- a/lisp/erc/erc-track.el
+++ b/lisp/erc/erc-track.el
@@ -900,6 +900,12 @@ Use `erc-make-mode-line-buffer-name' to create buttons."
   (when (called-interactively-p 'interactive)
     (erc-modified-channels-display)))
 
+(defun erc-track-clear ()
+  "Clear ERC's mode-line activity indicator."
+  (interactive)
+  (setq erc-modified-channels-alist nil)
+  (erc-modified-channels-display))
+
 (defun erc-track-find-face (faces)
   "Return the face to use in the mode line."
   (declare (obsolete erc-track-select-mode-line-face "28.1"))