--- uae/src/include/filesys.h	2018/04/24 16:42:25	1.1.1.2
+++ uae/src/include/filesys.h	2018/04/24 16:45:08	1.1.1.3
@@ -20,6 +20,7 @@ struct hardfiledata {
     int secspertrack;
     int surfaces;
     int reservedblocks;
+    int blocksize;
     FILE *fd;
 };