--- a/nsis-mode.el	Tue Feb 23 11:46:18 2010 +0200
+++ b/nsis-mode.el	Tue Feb 23 11:56:46 2010 +0200
@@ -64,6 +64,14 @@
   nil
   "Generic mode for nsis files.")
 
+(add-hook
+ 'nsis-mode-hook
+ (lambda ()
+   (modify-syntax-entry ?_ "w")
+   (modify-syntax-entry ?. "w")
+   )
+ )
+
 (provide 'nsis-mode)
 
 ;;; nsis-mode.el ends here