diff --git a/src/jpeg_reader.cpp b/src/jpeg_reader.cpp
index 09f16f33d..f7a491307 100644
--- a/src/jpeg_reader.cpp
+++ b/src/jpeg_reader.cpp
@@ -34,7 +34,6 @@ extern "C"
 #include <boost/shared_ptr.hpp>
 #include <boost/scoped_array.hpp>
 #include <boost/iostreams/device/file.hpp>
-//#include <boost/iostreams/device/file_descriptor.hpp>
 #include <boost/iostreams/device/array.hpp>
 #include <boost/iostreams/stream.hpp>
 
diff --git a/src/png_reader.cpp b/src/png_reader.cpp
index 4facf9a84..73a3a5ec7 100644
--- a/src/png_reader.cpp
+++ b/src/png_reader.cpp
@@ -30,9 +30,9 @@ extern "C"
 }
 // boost
 #include <boost/scoped_array.hpp>
+// iostreams
 #include <boost/iostreams/device/file.hpp>
-//#include <boost/iostreams/device/file_descriptor.hpp>
-//#include <boost/iostreams/device/mapped_file.hpp>
+#include <boost/iostreams/device/array.hpp>
 #include <boost/iostreams/stream.hpp>
 
 namespace mapnik