diff --git a/server/modules/monitor/mysql_mon.c b/server/modules/monitor/mysql_mon.c
index 1dc8a7132..4bb8a59b5 100644
--- a/server/modules/monitor/mysql_mon.c
+++ b/server/modules/monitor/mysql_mon.c
@@ -324,7 +324,7 @@ static inline bool connect_to_db(MONITOR* mon,MONITOR_SERVERS *database)
 
 static inline void monitor_mysql100_db(MONITOR_SERVERS* database)
 {
-    int isslave = false;
+    int isslave = 0;
     MYSQL_RES* result;
     MYSQL_ROW row;