diff --git a/src/cdrom/cdrom_mitsumi.c b/src/cdrom/cdrom_mitsumi.c
index cfd3cd84b..f1b292f42 100644
--- a/src/cdrom/cdrom_mitsumi.c
+++ b/src/cdrom/cdrom_mitsumi.c
@@ -397,7 +397,7 @@ mitsumi_cdrom_out(uint16_t port, uint8_t val, void *priv)
                     dev->cmdbuf[0]    = 1;
                     dev->cmdbuf[1]    = 'D';
                     dev->cmdbuf[2]    = 0;
-                    dev->cmdbuf_count = 4;
+                    dev->cmdbuf_count = 3;
                     break;
                 case CMD_EJECT:
                     cdrom_stop(&cdrom);