diff --git a/physical/mysql/mysql.go b/physical/mysql/mysql.go
index af666b5d6c..db078af5d2 100644
--- a/physical/mysql/mysql.go
+++ b/physical/mysql/mysql.go
@@ -621,9 +621,9 @@ func (i *MySQLLock) becomeLeader() error {
 func (i *MySQLLock) Lock() error {
 	defer metrics.MeasureSince([]string{"mysql", "get_lock"}, time.Now())
 
-	// Lock timeout math.MaxUint32 instead of -1 solves compatibility issues with
+	// Lock timeout math.MaxInt32 instead of -1 solves compatibility issues with
 	// different MySQL flavours i.e. MariaDB
-	rows, err := i.in.Query("SELECT GET_LOCK(?, ?), IS_USED_LOCK(?)", i.key, math.MaxUint32, i.key)
+	rows, err := i.in.Query("SELECT GET_LOCK(?, ?), IS_USED_LOCK(?)", i.key, math.MaxInt32, i.key)
 	if err != nil {
 		return err
 	}