diff --git a/lib/jekyll/reader.rb b/lib/jekyll/reader.rb
index d8f6eac4..86edde60 100644
--- a/lib/jekyll/reader.rb
+++ b/lib/jekyll/reader.rb
@@ -73,5 +73,11 @@ module Jekyll
           SafeYAML.load_file(path)
       end
     end
+
+    def sanitize_filename(name)
+      name.gsub!(/[^\w\s_-]+/, '')
+      name.gsub!(/(^|\b\s)\s+($|\s?\b)/, '\\1\\2')
+      name.gsub(/\s+/, '_')
+    end
   end
 end
\ No newline at end of file
diff --git a/lib/jekyll/site.rb b/lib/jekyll/site.rb
index ff964d7e..f708f095 100644
--- a/lib/jekyll/site.rb
+++ b/lib/jekyll/site.rb
@@ -232,7 +232,7 @@ module Jekyll
         path = reader.in_source_dir(dir, entry)
         next if File.symlink?(path) && safe
 
-        key = sanitize_filename(File.basename(entry, '.*'))
+        key = reader.sanitize_filename(File.basename(entry, '.*'))
         if File.directory?(path)
           read_data_to(path, data[key] = {})
         else
@@ -464,11 +464,5 @@ module Jekyll
     def site_cleaner
       @site_cleaner ||= Cleaner.new(self)
     end
-
-    def sanitize_filename(name)
-      name.gsub!(/[^\w\s_-]+/, '')
-      name.gsub!(/(^|\b\s)\s+($|\s?\b)/, '\\1\\2')
-      name.gsub(/\s+/, '_')
-    end
   end
 end