1 files changed, 13 insertions, 4 deletions
diff --git a/libc/kernel/uapi/linux/fd.h b/libc/kernel/uapi/linux/fd.h
index f3c2d50ef..4d72d6954 100644
--- a/libc/kernel/uapi/linux/fd.h
+++ b/libc/kernel/uapi/linux/fd.h
@@ -84,7 +84,8 @@ struct floppy_drive_params {
 #define FD_SILENT_DCL_CLEAR 0x4
 #define FD_INVERTED_DCL 0x80
   char read_track;
-  short autodetect[8];
+#define FD_AUTODETECT_SIZE 8
+  short autodetect[FD_AUTODETECT_SIZE];
   int checkfreq;
   int native_format;
 };
@@ -181,10 +182,18 @@ struct floppy_raw_cmd {
   long phys_length;
   int buffer_length;
   unsigned char rate;
+#define FD_RAW_CMD_SIZE 16
+#define FD_RAW_REPLY_SIZE 16
+#define FD_RAW_CMD_FULLSIZE (FD_RAW_CMD_SIZE + 1 + FD_RAW_REPLY_SIZE)
   unsigned char cmd_count;
-  unsigned char cmd[16];
-  unsigned char reply_count;
-  unsigned char reply[16];
+  union {
+    struct {
+      unsigned char cmd[FD_RAW_CMD_SIZE];
+      unsigned char reply_count;
+      unsigned char reply[FD_RAW_REPLY_SIZE];
+    };
+    unsigned char fullcmd[FD_RAW_CMD_FULLSIZE];
+  };
   int track;
   int resultcode;
   int reserved1;