diff --git a/lib/fastimage.rb b/lib/fastimage.rb
index 1428ee3..7486d9f 100644
--- a/lib/fastimage.rb
+++ b/lib/fastimage.rb
@@ -350,6 +350,7 @@ class FastImage
   end
 
   def fetch_using_file_open
+    @content_length = File.size?(@uri)
     File.open(@uri) do |s|
       fetch_using_read(s)
     end
diff --git a/test/test.rb b/test/test.rb
index 86afcf3..12c9630 100644
--- a/test/test.rb
+++ b/test/test.rb
@@ -152,6 +152,10 @@ class FastImageTest < Test::Unit::TestCase
       assert_equal info[1], FastImage.size(File.join(FixturePath, fn))
     end
   end
+  
+  def test_should_report_content_length_correctly_for_local_files
+    assert_equal 3296, FastImage.new(File.join(FixturePath, "test.bmp")).content_length
+  end
 
   def test_should_report_type_correctly_for_ios
     GoodFixtures.each do |fn, info|