diff --git a/Documentation/ioctl-number.txt b/Documentation/ioctl-number.txt
index 8f750c0..3de7d37 100644
--- a/Documentation/ioctl-number.txt
+++ b/Documentation/ioctl-number.txt
@@ -138,7 +138,8 @@
 'm'	00-1F	net/irda/irmod.h	conflict!
 'n'	00-7F	linux/ncp_fs.h
 'n'	E0-FF	video/matrox.h          matroxfb
-'p'	00-3F	linux/mc146818rtc.h
+'p'	00-0F	linux/phantom.h		conflict! (OpenHaptics needs this)
+'p'	00-3F	linux/mc146818rtc.h	conflict!
 'p'	40-7F	linux/nvram.h
 'p'	80-9F				user-space parport
 					<mailto:tim@cyberelk.net>