diff --git a/src/components/BackButton.tsx b/src/components/BackButton.tsx
index f0cebcdb..b0567a37 100644
--- a/src/components/BackButton.tsx
+++ b/src/components/BackButton.tsx
@@ -20,7 +20,17 @@ const BackButton: React.FC<BackButtonProps> = ({
   const navigate = useNavigate();
   const location = useLocation();
   const state = (location.state as { backTo?: string }) || {};
-  const canGoBack = typeof window !== 'undefined' && window.history.length > 1;
+  const canGoBack = (() => {
+    if (typeof window === 'undefined') return false;
+    if (window.history.length <= 1) return false;
+    const ref = document.referrer;
+    if (!ref) return false;
+    try {
+      return new URL(ref).origin === window.location.origin;
+    } catch {
+      return false;
+    }
+  })();
 
   const handleClick = () => {
     if (canGoBack) {