diff --git a/models/issue.go b/models/issue.go
index cc3e4ad02..dbe01f6f4 100644
--- a/models/issue.go
+++ b/models/issue.go
@@ -1405,6 +1405,10 @@ func (m *Milestone) State() api.StateType {
 	return api.STATE_OPEN
 }
 
+func (m *Milestone) ChangeStatus(isClosed bool) error {
+	return ChangeMilestoneStatus(m, isClosed)
+}
+
 func (m *Milestone) APIFormat() *api.Milestone {
 	apiMilestone := &api.Milestone{
 		ID:           m.ID,
@@ -1513,6 +1517,8 @@ func MilestoneStats(repoID int64) (open int64, closed int64) {
 }
 
 // ChangeMilestoneStatus changes the milestone open/closed status.
+// If milestone passes with changed values, those values will be
+// updated to database as well.
 func ChangeMilestoneStatus(m *Milestone, isClosed bool) (err error) {
 	repo, err := GetRepositoryByID(m.RepoID)
 	if err != nil {
diff --git a/routers/api/v1/repo/milestone.go b/routers/api/v1/repo/milestone.go
index 2dcc3a52c..bd408f638 100644
--- a/routers/api/v1/repo/milestone.go
+++ b/routers/api/v1/repo/milestone.go
@@ -81,10 +81,16 @@ func EditMilestone(ctx *context.APIContext, form api.EditMilestoneOption) {
 		milestone.Deadline = *form.Deadline
 	}
 
-	if err := models.UpdateMilestone(milestone); err != nil {
+	if form.State != nil {
+		if err = milestone.ChangeStatus(api.STATE_CLOSED == api.StateType(*form.State)); err != nil {
+			ctx.Error(500, "ChangeStatus", err)
+			return
+		}
+	} else if err = models.UpdateMilestone(milestone); err != nil {
 		ctx.Handle(500, "UpdateMilestone", err)
 		return
 	}
+
 	ctx.JSON(200, milestone.APIFormat())
 }