diff --git a/cmd/hook.go b/cmd/hook.go
index dd5a4f236..8533e3b1d 100644
--- a/cmd/hook.go
+++ b/cmd/hook.go
@@ -22,6 +22,7 @@ import (
 	"github.com/gogits/git-module"
 
 	"github.com/gogits/gogs/models"
+	"github.com/gogits/gogs/models/errors"
 	"github.com/gogits/gogs/pkg/httplib"
 	"github.com/gogits/gogs/pkg/mailer"
 	"github.com/gogits/gogs/pkg/setting"
@@ -94,7 +95,7 @@ func runHookPreReceive(c *cli.Context) error {
 		repoID := com.StrTo(os.Getenv(http.ENV_REPO_ID)).MustInt64()
 		protectBranch, err := models.GetProtectBranchOfRepoByName(repoID, branchName)
 		if err != nil {
-			if models.IsErrBranchNotExist(err) {
+			if errors.IsErrBranchNotExist(err) {
 				continue
 			}
 			fail("Internal error", "GetProtectBranchOfRepoByName [repo_id: %d, branch: %s]: %v", repoID, branchName, err)
diff --git a/models/error.go b/models/error.go
index 08548c7da..410a5a7e9 100644
--- a/models/error.go
+++ b/models/error.go
@@ -388,26 +388,6 @@ func (err ErrRepoFileAlreadyExist) Error() string {
 	return fmt.Sprintf("repository file already exists [file_name: %s]", err.FileName)
 }
 
-// __________                             .__
-// \______   \____________    ____   ____ |  |__
-//  |    |  _/\_  __ \__  \  /    \_/ ___\|  |  \
-//  |    |   \ |  | \// __ \|   |  \  \___|   Y  \
-//  |______  / |__|  (____  /___|  /\___  >___|  /
-//         \/             \/     \/     \/     \/
-
-type ErrBranchNotExist struct {
-	Name string
-}
-
-func IsErrBranchNotExist(err error) bool {
-	_, ok := err.(ErrBranchNotExist)
-	return ok
-}
-
-func (err ErrBranchNotExist) Error() string {
-	return fmt.Sprintf("branch does not exist [name: %s]", err.Name)
-}
-
 // __________      .__  .__ __________                                     __
 // \______   \__ __|  | |  |\______   \ ____  ________ __   ____   _______/  |_
 //  |     ___/  |  \  | |  | |       _// __ \/ ____/  |  \_/ __ \ /  ___/\   __\
diff --git a/models/errors/repo.go b/models/errors/repo.go
index 69c29be66..c9894af91 100644
--- a/models/errors/repo.go
+++ b/models/errors/repo.go
@@ -72,3 +72,16 @@ func IsBranchAlreadyExists(err error) bool {
 func (err BranchAlreadyExists) Error() string {
 	return fmt.Sprintf("branch already exists [name: %s]", err.Name)
 }
+
+type ErrBranchNotExist struct {
+	Name string
+}
+
+func IsErrBranchNotExist(err error) bool {
+	_, ok := err.(ErrBranchNotExist)
+	return ok
+}
+
+func (err ErrBranchNotExist) Error() string {
+	return fmt.Sprintf("branch does not exist [name: %s]", err.Name)
+}
diff --git a/models/repo_branch.go b/models/repo_branch.go
index 10931b0c3..ce06c9f35 100644
--- a/models/repo_branch.go
+++ b/models/repo_branch.go
@@ -11,6 +11,7 @@ import (
 	"github.com/Unknwon/com"
 	"github.com/gogits/git-module"
 
+	"github.com/gogits/gogs/models/errors"
 	"github.com/gogits/gogs/pkg/tool"
 )
 
@@ -45,7 +46,7 @@ func GetBranchesByPath(path string) ([]*Branch, error) {
 
 func (repo *Repository) GetBranch(br string) (*Branch, error) {
 	if !git.IsBranchExist(repo.RepoPath(), br) {
-		return nil, ErrBranchNotExist{br}
+		return nil, errors.ErrBranchNotExist{br}
 	}
 	return &Branch{
 		RepoPath: repo.RepoPath(),
@@ -101,7 +102,7 @@ func GetProtectBranchOfRepoByName(repoID int64, name string) (*ProtectBranch, er
 	if err != nil {
 		return nil, err
 	} else if !has {
-		return nil, ErrBranchNotExist{name}
+		return nil, errors.ErrBranchNotExist{name}
 	}
 	return protectBranch, nil
 }
diff --git a/routes/api/v1/repo/branch.go b/routes/api/v1/repo/branch.go
index d8c2697b2..3e0014785 100644
--- a/routes/api/v1/repo/branch.go
+++ b/routes/api/v1/repo/branch.go
@@ -7,7 +7,7 @@ package repo
 import (
 	api "github.com/gogits/go-gogs-client"
 
-	"github.com/gogits/gogs/models"
+	"github.com/gogits/gogs/models/errors"
 	"github.com/gogits/gogs/pkg/context"
 	"github.com/gogits/gogs/routes/api/v1/convert"
 )
@@ -16,7 +16,7 @@ import (
 func GetBranch(c *context.APIContext) {
 	branch, err := c.Repo.Repository.GetBranch(c.Params("*"))
 	if err != nil {
-		if models.IsErrBranchNotExist(err) {
+		if errors.IsErrBranchNotExist(err) {
 			c.Error(404, "GetBranch", err)
 		} else {
 			c.Error(500, "GetBranch", err)
diff --git a/routes/repo/setting.go b/routes/repo/setting.go
index 61c8f3111..ce96cf24b 100644
--- a/routes/repo/setting.go
+++ b/routes/repo/setting.go
@@ -433,7 +433,7 @@ func SettingsProtectedBranch(c *context.Context) {
 
 	protectBranch, err := models.GetProtectBranchOfRepoByName(c.Repo.Repository.ID, branch)
 	if err != nil {
-		if !models.IsErrBranchNotExist(err) {
+		if !errors.IsErrBranchNotExist(err) {
 			c.Handle(500, "GetProtectBranchOfRepoByName", err)
 			return
 		}
@@ -475,7 +475,7 @@ func SettingsProtectedBranchPost(c *context.Context, f form.ProtectBranch) {
 
 	protectBranch, err := models.GetProtectBranchOfRepoByName(c.Repo.Repository.ID, branch)
 	if err != nil {
-		if !models.IsErrBranchNotExist(err) {
+		if !errors.IsErrBranchNotExist(err) {
 			c.Handle(500, "GetProtectBranchOfRepoByName", err)
 			return
 		}