diff --git a/sys/conf/options b/sys/conf/options
index 0878dad3f78..2a3f9f591df 100644
--- a/sys/conf/options
+++ b/sys/conf/options
@@ -30,6 +30,8 @@
 # opt_<name-of-option-in-lower-case>.h
 
 # Adaptec Array Controller driver options
+AAC_COMPAT_LINUX	opt_acc.h	# Enable the linux ioctl interface
+
 AAC_DEBUG		opt_aac.h	# Debugging levels:
 					# 0 - quiet, only emit warnings
 					# 1 - noisy, emit major function