diff --git a/src/image.cpp b/src/image.cpp
index 38c5bc3..3791883 100644
--- a/src/image.cpp
+++ b/src/image.cpp
@@ -73,7 +73,11 @@ void image::write(Image &image)
     string magick = image.image.magick();
     std::transform(magick.begin(), magick.end(), magick.begin(), ::tolower);
 
-    cout << "Content-Type: image/" << magick << endl << endl;
-    cout.flush();   // We need to flush before we use /dev/stdout directly.
-    image.image.write("/dev/stdout");
+    Magick::Blob res_buffer;
+    image.image.magick(magick);  // force the same format
+    image.image.write(&res_buffer);
+
+    cout << "Content-Type: image/" << magick << endl;
+    cout << "Content-Length: " << res_buffer.length() << endl << endl;
+    cout.write(static_cast<const char*>(res_buffer.data()), res_buffer.length());
 }