diff --git a/addon/components/validated-input/error.hbs b/addon/components/validated-input/error.hbs
index cf100abf..e50487ed 100644
--- a/addon/components/validated-input/error.hbs
+++ b/addon/components/validated-input/error.hbs
@@ -6,7 +6,7 @@
   <span
     class={{if
       (macroCondition (macroGetOwnConfig "isBootstrap"))
-      "invalid-feedback"
+      "d-block invalid-feedback"
     }}
     ...attributes
   >
diff --git a/tests/integration/components/validated-input/error-test.js b/tests/integration/components/validated-input/error-test.js
index 2af1bb34..a93bd1c7 100644
--- a/tests/integration/components/validated-input/error-test.js
+++ b/tests/integration/components/validated-input/error-test.js
@@ -35,6 +35,7 @@ module("Integration | Component | validated-input/error", function (hooks) {
     await render(hbs`<ValidatedInput::Error @errors={{this.errors}} />`);
 
     assert.dom("span").hasClass("invalid-feedback");
+    assert.dom("span").hasClass("d-block");
     assert.dom("span").hasText("foo, bar, baz");
   });
 });