diff --git a/lib/rexical/generator.rb b/lib/rexical/generator.rb
index cdfb46c..46752f0 100644
--- a/lib/rexical/generator.rb
+++ b/lib/rexical/generator.rb
@@ -314,7 +314,7 @@ def scan_str(str)
 
       def load_file( filename )
         @filename = filename
-        open(filename, "r") do |f|
+        File.open(filename, "r") do |f|
           scan_setup(f.read)
         end
       end