Tag the DEFVAR macros in the emacs source files:
.br
-\fI\-\-regex\='/[ \\t]*DEFVAR_[A-Z_ \\t(]+"\\([^"]+\\)"\/'\fP
+\fI\-\-regex\='/[ \\t]*DEFVAR_[A-Z_ \\t(]+"\\([^"]+\\)"/'\fP
.\"" This comment is to avoid confusion to Emacs syntax highlighting
.br