diff --git a/Storage/Disk/Formats/OricMFMDSK.cpp b/Storage/Disk/Formats/OricMFMDSK.cpp
index c0de30f9e..2f0de70aa 100644
--- a/Storage/Disk/Formats/OricMFMDSK.cpp
+++ b/Storage/Disk/Formats/OricMFMDSK.cpp
@@ -26,6 +26,11 @@ OricMFMDSK::OricMFMDSK(const char *file_name) :
 		throw ErrorNotOricMFMDSK;
 }
 
+OricMFMDSK::~OricMFMDSK()
+{
+	flush_updates();
+}
+
 unsigned int OricMFMDSK::get_head_position_count()
 {
 	return track_count_;
@@ -36,7 +41,12 @@ unsigned int OricMFMDSK::get_head_count()
 	return head_count_;
 }
 
-std::shared_ptr<Track> OricMFMDSK::get_uncached_track_at_position(unsigned int head, unsigned int position)
+bool OricMFMDSK::get_is_read_only()
+{
+	return is_read_only_;
+}
+
+long OricMFMDSK::get_file_offset_for_position(unsigned int head, unsigned int position)
 {
 	long seek_offset = 0;
 	switch(geometry_type_)
@@ -48,7 +58,12 @@ std::shared_ptr<Track> OricMFMDSK::get_uncached_track_at_position(unsigned int h
 			seek_offset = (position * track_count_ * head_count_) + head;
 		break;
 	}
-	fseek(file_, (seek_offset * 6400) + 256, SEEK_SET);
+	return (seek_offset * 6400) + 256;
+}
+
+std::shared_ptr<Track> OricMFMDSK::get_uncached_track_at_position(unsigned int head, unsigned int position)
+{
+	fseek(file_, get_file_offset_for_position(head, position), SEEK_SET);
 
 	PCMSegment segment;
 
@@ -115,3 +130,7 @@ std::shared_ptr<Track> OricMFMDSK::get_uncached_track_at_position(unsigned int h
 	std::shared_ptr<PCMTrack> track(new PCMTrack(segment));
 	return track;
 }
+
+void OricMFMDSK::store_updated_track_at_position(unsigned int head, unsigned int position, const std::shared_ptr<Track> &track, std::mutex &file_access_mutex)
+{
+}
diff --git a/Storage/Disk/Formats/OricMFMDSK.hpp b/Storage/Disk/Formats/OricMFMDSK.hpp
index f4d944a4b..53dac1904 100644
--- a/Storage/Disk/Formats/OricMFMDSK.hpp
+++ b/Storage/Disk/Formats/OricMFMDSK.hpp
@@ -27,6 +27,7 @@ class OricMFMDSK: public Disk, public Storage::FileHolder {
 			@throws ErrorNotAcornADF if the file doesn't appear to contain an Acorn .ADF format image.
 		*/
 		OricMFMDSK(const char *file_name);
+		~OricMFMDSK();
 
 		enum {
 			ErrorNotOricMFMDSK,
@@ -35,9 +36,13 @@ class OricMFMDSK: public Disk, public Storage::FileHolder {
 		// implemented to satisfy @c Disk
 		unsigned int get_head_position_count();
 		unsigned int get_head_count();
+		bool get_is_read_only();
 
 	private:
+		void store_updated_track_at_position(unsigned int head, unsigned int position, const std::shared_ptr<Track> &track, std::mutex &file_access_mutex);
 		std::shared_ptr<Track> get_uncached_track_at_position(unsigned int head, unsigned int position);
+		long get_file_offset_for_position(unsigned int head, unsigned int position);
+
 		uint32_t head_count_;
 		uint32_t track_count_;
 		uint32_t geometry_type_;