diff --git a/plugins/copybuffer/README.md b/plugins/copybuffer/README.md
index 11d16ae93..da138bdbd 100644
--- a/plugins/copybuffer/README.md
+++ b/plugins/copybuffer/README.md
@@ -1,7 +1,7 @@
 # `copybuffer` plugin
 
-This plugin adds a keybinding that copies the text that is currently typed in
-the command line (the buffer) to the system clipboard.
+This plugin binds the ctrl-o keyboard shortcut to a command that copies the text
+that is currently typed in the command line ($BUFFER) to the system clipboard.
 
 This is useful if you type a command - and before you hit enter to execute it - want
 to copy it maybe so you can paste it into a script, gist or whatnot.