--- kernel/bsd/isofs/cd9660/cd9660_vfsops.c	2018/04/24 18:26:01	1.1
+++ kernel/bsd/isofs/cd9660/cd9660_vfsops.c	2018/04/24 18:27:25	1.1.1.2
@@ -894,7 +894,7 @@ cd9660_vget_internal(mp, ino, vpp, reloc
 	 */
 	switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) {
 	case VFIFO:
-#ifdef	FIFO
+#if	FIFO
 		vp->v_op = cd9660_fifoop_p;
 		break;
 #else