diff --git a/models/issue_label.go b/models/issue_label.go
index ab6c4731e..bf61fcaec 100644
--- a/models/issue_label.go
+++ b/models/issue_label.go
@@ -134,7 +134,7 @@ func NewLabels(labels ...*Label) error {
 // If pass repoID as 0, then ORM will ignore limitation of repository
 // and can return arbitrary label with any valid ID.
 func getLabelInRepoByName(e Engine, repoID int64, labelName string) (*Label, error) {
-	if len(labelName) <= 0 {
+	if len(labelName) == 0 {
 		return nil, ErrLabelNotExist{0, repoID}
 	}
 
diff --git a/models/org.go b/models/org.go
index 1cc25231e..c0a4172dc 100644
--- a/models/org.go
+++ b/models/org.go
@@ -677,7 +677,7 @@ func (env *accessibleReposEnv) Repos(page, pageSize int) ([]*Repository, error)
 	}
 
 	repos := make([]*Repository, 0, len(repoIDs))
-	if len(repoIDs) <= 0 {
+	if len(repoIDs) == 0 {
 		return repos, nil
 	}
 
@@ -705,7 +705,7 @@ func (env *accessibleReposEnv) MirrorRepos() ([]*Repository, error) {
 	}
 
 	repos := make([]*Repository, 0, len(repoIDs))
-	if len(repoIDs) <= 0 {
+	if len(repoIDs) == 0 {
 		return repos, nil
 	}
 
diff --git a/models/ssh_key.go b/models/ssh_key.go
index c2836e688..2592209b4 100644
--- a/models/ssh_key.go
+++ b/models/ssh_key.go
@@ -376,7 +376,7 @@ func calcFingerprint(publicKeyContent string) (string, error) {
 }
 
 func addKey(e Engine, key *PublicKey) (err error) {
-	if len(key.Fingerprint) <= 0 {
+	if len(key.Fingerprint) == 0 {
 		key.Fingerprint, err = calcFingerprint(key.Content)
 		if err != nil {
 			return err
diff --git a/modules/auth/auth.go b/modules/auth/auth.go
index 8391e7de8..0d703084d 100644
--- a/modules/auth/auth.go
+++ b/modules/auth/auth.go
@@ -36,7 +36,7 @@ func SignedInID(ctx *macaron.Context, sess session.Store) int64 {
 	// Check access token.
 	if IsAPIPath(ctx.Req.URL.Path) {
 		tokenSHA := ctx.Query("token")
-		if len(tokenSHA) <= 0 {
+		if len(tokenSHA) == 0 {
 			tokenSHA = ctx.Query("access_token")
 		}
 		if len(tokenSHA) == 0 {
diff --git a/modules/user/user_test.go b/modules/user/user_test.go
index 51f10dbbd..ae7460281 100644
--- a/modules/user/user_test.go
+++ b/modules/user/user_test.go
@@ -18,7 +18,7 @@ func getWhoamiOutput() (string, error) {
 
 func TestCurrentUsername(t *testing.T) {
 	user := CurrentUsername()
-	if len(user) <= 0 {
+	if len(user) == 0 {
 		t.Errorf("expected non-empty user, got: %s", user)
 	}
 	// Windows whoami is weird, so just skip remaining tests
diff --git a/routers/api/v1/api.go b/routers/api/v1/api.go
index 23a85759c..3a539f6ce 100644
--- a/routers/api/v1/api.go
+++ b/routers/api/v1/api.go
@@ -80,7 +80,7 @@ import (
 func sudo() macaron.Handler {
 	return func(ctx *context.APIContext) {
 		sudo := ctx.Query("sudo")
-		if len(sudo) <= 0 {
+		if len(sudo) == 0 {
 			sudo = ctx.Req.Header.Get("Sudo")
 		}
 
diff --git a/routers/user/home.go b/routers/user/home.go
index 0c84b2498..cbab5c835 100644
--- a/routers/user/home.go
+++ b/routers/user/home.go
@@ -213,7 +213,7 @@ func Issues(ctx *context.Context) {
 			return
 		}
 	}
-	if len(userRepoIDs) <= 0 {
+	if len(userRepoIDs) == 0 {
 		userRepoIDs = []int64{-1}
 	}