diff --git a/lisp/mouse.el b/lisp/mouse.el
index 7bac6dd07bf..091383bf110 100644
--- a/lisp/mouse.el
+++ b/lisp/mouse.el
@@ -2466,7 +2466,7 @@ a large number if you prefer a mixed multitude.  The default is 4."
     ("Text" . "Text")
     ("Outline" . "Text")
     ("\\(HT\\|SG\\|X\\|XHT\\)ML" . "SGML")
-    ("log\\|diff\\|vc\\|cvs\\|Git\\|Annotate" . "Version Control")
+    ("\\blog\\b\\|diff\\|\\bvc\\b\\|cvs\\|Git\\|Annotate" . "Version Control")
     ("Threads\\|Memory\\|Disassembly\\|Breakpoints\\|Frames\\|Locals\\|Registers\\|Inferior I/O\\|Debugger"
      . "GDB")
     ("Lisp" . "Lisp")))