diff --git a/Storage/Disk/DiskImage/Formats/MSA.hpp b/Storage/Disk/DiskImage/Formats/MSA.hpp
index 5bd8542f0..b79ecfe41 100644
--- a/Storage/Disk/DiskImage/Formats/MSA.hpp
+++ b/Storage/Disk/DiskImage/Formats/MSA.hpp
@@ -29,6 +29,7 @@ class MSA final: public DiskImage {
 		HeadPosition get_maximum_head_position() override;
 		int get_head_count() override;
 		std::shared_ptr<::Storage::Disk::Track> get_track_at_position(::Storage::Disk::Track::Address address) override;
+		bool get_is_read_only() override { return false; }
 
 	private:
 		FileHolder file_;