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-rw-r--r--sys/netpfil/ipfw/ip_dn_io.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/sys/netpfil/ipfw/ip_dn_io.c b/sys/netpfil/ipfw/ip_dn_io.c
index 9a4b486..7afa1e2 100644
--- a/sys/netpfil/ipfw/ip_dn_io.c
+++ b/sys/netpfil/ipfw/ip_dn_io.c
@@ -39,6 +39,7 @@ __FBSDID("$FreeBSD$");
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/module.h>
+#include <sys/mutex.h>
#include <sys/priv.h>
#include <sys/proc.h>
#include <sys/rwlock.h>
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