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-rw-r--r--doc/sync/notrack/conntrackd.conf3
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/sync/notrack/conntrackd.conf b/doc/sync/notrack/conntrackd.conf
index 11f022e..3d036fb 100644
--- a/doc/sync/notrack/conntrackd.conf
+++ b/doc/sync/notrack/conntrackd.conf
@@ -256,7 +256,8 @@ Sync {
# Set this option on if you want to enable the synchronization
# of expectations. You have to specify the list of helpers that
- # you want to enable. Default is off.
+ # you want to enable. Default is off. This feature requires
+ # a Linux kernel >= 3.5.
#
# ExpectationSync {
# ftp