diff --git a/src/django_bootstrap5/renderers.py b/src/django_bootstrap5/renderers.py
index 0a3f2d95..dd05fcef 100644
--- a/src/django_bootstrap5/renderers.py
+++ b/src/django_bootstrap5/renderers.py
@@ -302,7 +302,7 @@ def add_widget_class_attrs(self, widget=None):
         size_prefix = None
 
         before = []
-        classes = [widget.attrs.get("class", "")]
+        classes = [widget.attrs.get("class", ""), text_value(self.field_class)]
 
         if ReadOnlyPasswordHashWidget is not None and isinstance(widget, ReadOnlyPasswordHashWidget):
             before.append("form-control-static")
diff --git a/tests/test_bootstrap_field.py b/tests/test_bootstrap_field.py
index 39432fa2..bf5de1e2 100644
--- a/tests/test_bootstrap_field.py
+++ b/tests/test_bootstrap_field.py
@@ -33,6 +33,10 @@ def test_placeholder(self):
         self.assertIn('type="text"', html)
         self.assertIn('placeholder="placeholdertest"', html)
 
+    def test_field_class(self):
+        html = self.render("{% bootstrap_field form.subject field_class='field-class-test' %}", {"form": SubjectTestForm()})
+        self.assertIn('class="form-control field-class-test"', html)
+
     def test_xss_field(self):
         html = self.render("{% bootstrap_field form.xss_field %}", {"form": XssTestForm()})
         self.assertIn('type="text"', html)