diff --git a/server/routes/system.js b/server/routes/system.js
index 5abe246..a79c90e 100644
--- a/server/routes/system.js
+++ b/server/routes/system.js
@@ -590,6 +590,8 @@ router.post('/version/update', isAuthenticated, hasRole('admin'), async (req, re
         authPrefix = `git remote set-url origin ${auth.url} && `;
     }
 
+    const isWindows = process.platform === 'win32';
+
     // Build a more robust update script
     // On dev environments, pm2 might fail, so we make it optional (|| echo)
     const updateScript = isWindows