diff --git a/src/providers/mssql/qgsmssqlprovider.cpp b/src/providers/mssql/qgsmssqlprovider.cpp
index 4cf649118868..d09d8157a785 100644
--- a/src/providers/mssql/qgsmssqlprovider.cpp
+++ b/src/providers/mssql/qgsmssqlprovider.cpp
@@ -1456,7 +1456,7 @@ bool QgsMssqlProvider::addAttributes( const QList<QgsField> &attributes )
   for ( QList<QgsField>::const_iterator it = attributes.begin(); it != attributes.end(); ++it )
   {
     QString type = it->typeName();
-    if ( type == QLatin1String( "char" ) || type == QLatin1String( "varchar" ) )
+    if ( type == QLatin1String( "char" ) || type == QLatin1String( "varchar" ) || type == QLatin1String( "nvarchar" ) )
     {
       if ( it->length() > 0 )
         type = QStringLiteral( "%1(%2)" ).arg( type ).arg( it->length() );
diff --git a/tests/src/python/test_provider_mssql.py b/tests/src/python/test_provider_mssql.py
index b5774364bca7..053761e03762 100644
--- a/tests/src/python/test_provider_mssql.py
+++ b/tests/src/python/test_provider_mssql.py
@@ -980,6 +980,23 @@ def test_insert_pk_escaping(self):
         features = list(vl.getFeatures())
         self.assertEqual([f['test-field'] for f in features], [1])
 
+    def test_nvarchar_length(self):
+        """
+        Test that nvarchar length is correctly set
+        """
+        md = QgsProviderRegistry.instance().providerMetadata('mssql')
+        conn = md.createConnection(self.dbconn, {})
+
+        conn.execSql('DROP TABLE IF EXISTS qgis_test.test_nvarchar_length')
+        conn.execSql('CREATE TABLE qgis_test.test_nvarchar_length (id integer PRIMARY KEY)')
+
+        uri = f'{self.dbconn} table="qgis_test"."test_nvarchar_length" sql='
+        vl = QgsVectorLayer(uri, '', 'mssql')
+
+        self.assertTrue(vl.isValid())
+        self.assertTrue(vl.dataProvider().addAttributes([QgsField('name', QMetaType.Type.QString, 'nvarchar', 12)]))
+        self.assertEqual(vl.dataProvider().fields().at(1).length(), 12)
+
 
 if __name__ == '__main__':
     unittest.main()