diff --git a/packages/shared/src/core/helpers/error.ts b/packages/shared/src/core/helpers/error.ts
index 717a07eba..fca9f07ca 100644
--- a/packages/shared/src/core/helpers/error.ts
+++ b/packages/shared/src/core/helpers/error.ts
@@ -18,7 +18,7 @@ export function ensureError(
     }
   }
   return new UnexpectedErrorStructureError(
-    `${fallbackMessage}${stringifiedError !== '' ? `Cause: ${stringifiedError}` : ''}`
+    `${fallbackMessage}${stringifiedError !== '' ? `. Cause: ${stringifiedError}` : ''}`
   )
 }