diff --git a/packages/bezier-react/src/components/LegacyStack/LegacyStack/LegacyStack.tsx b/packages/bezier-react/src/components/LegacyStack/LegacyStack/LegacyStack.tsx
index 0445122aa..250f2b160 100644
--- a/packages/bezier-react/src/components/LegacyStack/LegacyStack/LegacyStack.tsx
+++ b/packages/bezier-react/src/components/LegacyStack/LegacyStack/LegacyStack.tsx
@@ -85,7 +85,7 @@ export const LegacyStack = forwardRef<HTMLElement, LegacyStackProps>(
             ...(element.props ?? {}),
             direction,
             marginBefore:
-              ((element.props as LegacyStackItemProps)?.marginBefore ?? 0) +
+              (element.props as LegacyStackItemProps)?.marginBefore ??
               (index > firstValidElementIdx.current ? spacing : 0),
           } as LegacyStackItemProps)
         })}