diff --git a/lib/core-common/src/types.ts b/lib/core-common/src/types.ts
index f13260887e4..a5da3a29a75 100644
--- a/lib/core-common/src/types.ts
+++ b/lib/core-common/src/types.ts
@@ -278,7 +278,7 @@ export interface StorybookConfig {
     /**
      * Enable a set of planned breaking changes for SB7.0
      */
-    breakingChangesV7: boolean;
+    breakingChangesV7?: boolean;
   };
   /**
    * Tells Storybook where to find stories.