diff --git a/devices/storage/cdromdrive.h b/devices/storage/cdromdrive.h
index f60dbeb..bce89b2 100644
--- a/devices/storage/cdromdrive.h
+++ b/devices/storage/cdromdrive.h
@@ -60,12 +60,12 @@ public:
 
     void insert_image(std::string filename);
 
-    uint32_t inquiry(uint8_t *cmd_ptr, uint8_t *data_ptr);
-    uint32_t mode_sense_ex(uint8_t *cmd_ptr, uint8_t *data_ptr);
-    uint32_t request_sense(uint8_t *data_ptr, uint8_t sense_key, uint8_t asc,
-                           uint8_t ascq);
-    uint32_t report_capacity(uint8_t *data_ptr);
-    uint32_t read_toc(uint8_t *cmd_ptr, uint8_t *data_ptr);
+    virtual uint32_t inquiry(uint8_t *cmd_ptr, uint8_t *data_ptr);
+    virtual uint32_t mode_sense_ex(uint8_t *cmd_ptr, uint8_t *data_ptr);
+    virtual uint32_t request_sense(uint8_t *data_ptr, uint8_t sense_key, uint8_t asc,
+                                   uint8_t ascq);
+    virtual uint32_t report_capacity(uint8_t *data_ptr);
+    virtual uint32_t read_toc(uint8_t *cmd_ptr, uint8_t *data_ptr);
 
 protected:
     std::function<void(uint8_t, uint8_t)>  set_error;