diff --git a/client.go b/client.go
index 87bc3d4..1bb7736 100644
--- a/client.go
+++ b/client.go
@@ -69,7 +69,7 @@ func newClient(config ClientConfiguration) (*client, error) {
 
 	// check if token or private key is set
 	if len(config.Token) == 0 && config.PrivateKeyReader == nil {
-		return &client{}, errors.New("PrivateKeyReader, token or PrivateKeyReader is required")
+		return &client{}, errors.New("PrivateKeyPath, token or PrivateKeyReader is required")
 	}
 
 	if config.PrivateKeyReader != nil {
diff --git a/client_test.go b/client_test.go
index 03d672b..dea2246 100644
--- a/client_test.go
+++ b/client_test.go
@@ -45,7 +45,7 @@ func TestNewClient(t *testing.T) {
 	// ClientConfig with only AccountName set should raise error about private keys
 	_, err = NewClient(cc)
 	if assert.Errorf(t, err, "expecting private key, token required error") {
-		assert.EqualError(t, err, "PrivateKeyReader, token or PrivateKeyReader is required")
+		assert.EqualError(t, err, "PrivateKeyPath, token or PrivateKeyReader is required")
 	}
 
 	cc.PrivateKeyReader = iotest.TimeoutReader(bytes.NewReader([]byte{0, 1}))