diff --git a/sys/amd64/conf/GENERIC b/sys/amd64/conf/GENERIC
index 7a6616fea20..24d98e9f879 100644
--- a/sys/amd64/conf/GENERIC
+++ b/sys/amd64/conf/GENERIC
@@ -136,7 +136,8 @@ device		pass		# Passthrough device (direct SCSI access)
 device		ses		# SCSI Environmental Services (and SAF-TE)
 
 # RAID controllers interfaced to the SCSI subsystem
-device		amr		# AMI MegaRAID
+#XXX it is not 64-bit clean, -scottl
+#device		amr		# AMI MegaRAID
 device		arcmsr		# Areca SATA II RAID
 device		asr		# DPT SmartRAID V, VI and Adaptec SCSI RAID
 device		ciss		# Compaq Smart RAID 5*