diff --git a/packages/web-components/fast-components/src/radio-group/radio-group.styles.ts b/packages/web-components/fast-components/src/radio-group/radio-group.styles.ts
index 0f599f0995d..6c4056458ea 100644
--- a/packages/web-components/fast-components/src/radio-group/radio-group.styles.ts
+++ b/packages/web-components/fast-components/src/radio-group/radio-group.styles.ts
@@ -11,10 +11,10 @@ export const RadioGroupStyles = css`
         display: flex;
         flex-wrap: wrap;
     }
-    [orientation="vertical"] {
+    :host([orientation="vertical"]) .positioning-region {
         flex-direction: column;
     }
-    [orientation="horizontal"] {
+    :host([orientation="horizontal"]) .positioning-region {
         flex-direction: row;
     }
 `;