diff --git a/sys/conf/files b/sys/conf/files
index a08943c7a22..dee97b6d7a0 100644
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -205,6 +205,7 @@ cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_synctask.c		optional zfs compile-
 cddl/contrib/opensolaris/uts/common/fs/zfs/gzip.c			optional zfs compile-with "${ZFS_C}"
 cddl/contrib/opensolaris/uts/common/fs/zfs/lzjb.c			optional zfs compile-with "${ZFS_C}"
 cddl/contrib/opensolaris/uts/common/fs/zfs/metaslab.c			optional zfs compile-with "${ZFS_C}"
+cddl/contrib/opensolaris/uts/common/fs/zfs/mmp.c			optional zfs compile-with "${ZFS_C}"
 cddl/contrib/opensolaris/uts/common/fs/zfs/multilist.c			optional zfs compile-with "${ZFS_C}"
 cddl/contrib/opensolaris/uts/common/fs/zfs/range_tree.c			optional zfs compile-with "${ZFS_C}"
 cddl/contrib/opensolaris/uts/common/fs/zfs/refcount.c			optional zfs compile-with "${ZFS_C}"