diff --git a/server/core/monitor.c b/server/core/monitor.c
index fd2852d23..3158f379a 100644
--- a/server/core/monitor.c
+++ b/server/core/monitor.c
@@ -84,6 +84,7 @@ MONITOR	*mon;
 	mon->write_timeout = DEFAULT_WRITE_TIMEOUT;
 	mon->connect_timeout = DEFAULT_CONNECT_TIMEOUT;
 	mon->interval = MONITOR_INTERVAL;
+	mon->parameters = NULL;
 	spinlock_init(&mon->lock);
 	spinlock_acquire(&monLock);
 	mon->next = allMonitors;