diff --git a/lib/lldp/lldpd.h b/lib/lldp/lldpd.h
index ae167fbcc48..00224679cc1 100644
--- a/lib/lldp/lldpd.h
+++ b/lib/lldp/lldpd.h
@@ -38,7 +38,7 @@
 
 #define LLDPD_TX_INTERVAL      5
 #define LLDPD_TX_HOLD          4
-#define LLDPD_TTL              LLDPD_TX_INTERVAL * LLDPD_TX_HOLD
+#define LLDPD_TTL              (LLDPD_TX_INTERVAL * LLDPD_TX_HOLD)
 
 #define PROTO_SEND_SIG struct lldpd *, struct lldpd_hardware *,struct dp_packet *
 #define PROTO_DECODE_SIG struct lldpd *, char *, int, struct lldpd_hardware *,\
diff --git a/lib/ovs-lldp.h b/lib/ovs-lldp.h
index 0c8c501f047..825096ba3fb 100644
--- a/lib/ovs-lldp.h
+++ b/lib/ovs-lldp.h
@@ -28,7 +28,7 @@
 #include "timer.h"
 
 /* Transmit every LLDPD_TX_INTERVAL seconds. */
-#define LLDP_DEFAULT_TRANSMIT_INTERVAL_MS LLDPD_TX_INTERVAL * 1000
+#define LLDP_DEFAULT_TRANSMIT_INTERVAL_MS (LLDPD_TX_INTERVAL * 1000)
 
 struct flow;
 struct netdev;