diff --git a/mu4e/mu4e-main.el b/mu4e/mu4e-main.el
index 7a5f5f0f..a14a3982 100644
--- a/mu4e/mu4e-main.el
+++ b/mu4e/mu4e-main.el
@@ -70,14 +70,14 @@
 
 
 (defun mu4e~main-action-str (str &optional func-or-shortcut)
-  "Highlight the first occurence of [..] in STR.
+  "Highlight the first occurence of [.] in STR.
 If FUNC-OR-SHORTCUT is non-nil and if it is a function, call it
-when STR is clicked (using RET or mouse-2); if FUNC-OR-SHORTCUT
-is a string, execute the corresponding keyboard action when it is
+when STR is clicked (using RET or mouse-2); if FUNC-OR-SHORTCUT is
+a string, execute the corresponding keyboard action when it is
 clicked."
   (let ((newstr
 	  (replace-regexp-in-string
-	    "\\[\\(\\w+\\)\\]"
+	    "\\[\\(\\.\\)\\]"
 	    (lambda(m)
 	      (format "[%s]"
 		(propertize (match-string 1 m) 'face 'mu4e-highlight-face)))