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-rw-r--r--include/ntp_control.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/ntp_control.h b/include/ntp_control.h
index 85f41056c7b1..2fe0f30bbd78 100644
--- a/include/ntp_control.h
+++ b/include/ntp_control.h
@@ -1,3 +1,5 @@
+#ifndef NTP_CONTROL_H
+#define NTP_CONTROL_H
/*
* ntp_control.h - definitions related to NTP mode 6 control messages
*/
@@ -190,3 +192,5 @@ extern struct ctl_trap ctl_traps[CTL_MAXTRAPS];
#define IFSTATS_FIELDS 12
#define RESLIST_FIELDS 4
+#endif /* NTP_CONTROL_H */
+