diff --git a/usr.sbin/bhyveload/bhyveload.c b/usr.sbin/bhyveload/bhyveload.c
index c67a2f698936..55de2eceb0b2 100644
--- a/usr.sbin/bhyveload/bhyveload.c
+++ b/usr.sbin/bhyveload/bhyveload.c
@@ -311,10 +311,12 @@ cb_diskioctl(void *arg, int unit, u_long cmd, void *data)
 		*(u_int *)data = 512;
 		break;
 	case DIOCGMEDIASIZE:
-		if (fstat(disk_fd[unit], &sb) == 0)
-			*(off_t *)data = sb.st_size;
-		else
+		if (fstat(disk_fd[unit], &sb) != 0)
 			return (ENOTTY);
+		if (S_ISCHR(sb.st_mode) &&
+		    ioctl(disk_fd[unit], DIOCGMEDIASIZE, &sb.st_size) != 0)
+				return (ENOTTY);
+		*(off_t *)data = sb.st_size;
 		break;
 	default:
 		return (ENOTTY);