diff --git a/packages/block-editor/src/components/button-block-appender/style.scss b/packages/block-editor/src/components/button-block-appender/style.scss
index 835f302d1d4f27..3a2522309fdea4 100644
--- a/packages/block-editor/src/components/button-block-appender/style.scss
+++ b/packages/block-editor/src/components/button-block-appender/style.scss
@@ -39,6 +39,7 @@
 			width: 24px;
 			background-color: $dark-gray-primary;
 			color: $white;
+			border-radius: $radius-block-ui;
 		}
 
 		.block-editor-button-block-appender__label {