diff --git a/AltairZ80/s100_tarbell.c b/AltairZ80/s100_tarbell.c
index b39cb6ce..61564582 100644
--- a/AltairZ80/s100_tarbell.c
+++ b/AltairZ80/s100_tarbell.c
@@ -100,9 +100,6 @@ typedef struct {
 #define FD1771_STAT_DRQ        0x02
 #define FD1771_STAT_BUSY       0x01
 
-typedef struct {
-} TARBELL_DRIVE_STATUS;
-
 typedef struct {
     PNP_INFO  pnp;            /* Plug and Play */
     uint8     promEnabled;    /* PROM is enabled */