diff --git a/pkg/pmapi/labels.go b/pkg/pmapi/labels.go
index ad0d2133..8b8922ce 100644
--- a/pkg/pmapi/labels.go
+++ b/pkg/pmapi/labels.go
@@ -17,7 +17,10 @@
 
 package pmapi
 
-import "fmt"
+import (
+	"errors"
+	"fmt"
+)
 
 // System labels
 const (
@@ -129,6 +132,10 @@ type LabelRes struct {
 
 // CreateLabel creates a new label.
 func (c *client) CreateLabel(label *Label) (created *Label, err error) {
+	if label.Name == "" {
+		return nil, errors.New("name is required")
+	}
+
 	labelReq := &LabelReq{label}
 	req, err := c.NewJSONRequest("POST", "/labels", labelReq)
 	if err != nil {
@@ -146,6 +153,10 @@ func (c *client) CreateLabel(label *Label) (created *Label, err error) {
 
 // UpdateLabel updates a label.
 func (c *client) UpdateLabel(label *Label) (updated *Label, err error) {
+	if label.Name == "" {
+		return nil, errors.New("name is required")
+	}
+
 	labelReq := &LabelReq{label}
 	req, err := c.NewJSONRequest("PUT", "/labels/"+label.ID, labelReq)
 	if err != nil {
diff --git a/pkg/pmapi/labels_test.go b/pkg/pmapi/labels_test.go
index d3c556a7..82f422c5 100644
--- a/pkg/pmapi/labels_test.go
+++ b/pkg/pmapi/labels_test.go
@@ -147,6 +147,16 @@ func TestClient_CreateLabel(t *testing.T) {
 	}
 }
 
+func TestClient_CreateEmptyLabel(t *testing.T) {
+	s, c := newTestServer(http.HandlerFunc(func(_ http.ResponseWriter, _ *http.Request) {
+		r.Fail(t, "API should not be called")
+	}))
+	defer s.Close()
+
+	_, err := c.CreateLabel(&Label{})
+	r.EqualError(t, err, "name is required")
+}
+
 func TestClient_UpdateLabel(t *testing.T) {
 	s, c := newTestServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		Ok(t, checkMethodAndPath(r, "PUT", "/labels/"+testLabelCreated.ID))
@@ -173,6 +183,16 @@ func TestClient_UpdateLabel(t *testing.T) {
 	}
 }
 
+func TestClient_UpdateLabelToEmptyName(t *testing.T) {
+	s, c := newTestServer(http.HandlerFunc(func(_ http.ResponseWriter, _ *http.Request) {
+		r.Fail(t, "API should not be called")
+	}))
+	defer s.Close()
+
+	_, err := c.UpdateLabel(&Label{ID: "label"})
+	r.EqualError(t, err, "name is required")
+}
+
 func TestClient_DeleteLabel(t *testing.T) {
 	s, c := newTestServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		Ok(t, checkMethodAndPath(r, "DELETE", "/labels/"+testLabelCreated.ID))
diff --git a/unreleased.md b/unreleased.md
index 42167d67..e53abaf2 100644
--- a/unreleased.md
+++ b/unreleased.md
@@ -22,3 +22,4 @@ Changelog [format](http://keepachangelog.com/en/1.0.0/)
 * GODT-389 Prefer `From` header instead of `MAIL FROM` address.
 * GODT-898 Only set ContentID for inline attachments.
 * GODT-773 Replace `INTERNALDATE` older than birthday of RFC822 by birthday of RFC822 to not crash Apple Mail.
+* GODT-927 Avoid to call API with empty label name.