diff --git a/src/components/setting/mods/sysproxy-viewer.tsx b/src/components/setting/mods/sysproxy-viewer.tsx
index 05d0c5b91..35d277fed 100644
--- a/src/components/setting/mods/sysproxy-viewer.tsx
+++ b/src/components/setting/mods/sysproxy-viewer.tsx
@@ -242,6 +242,7 @@ export const SysproxyViewer = forwardRef<DialogRef>((props, ref) => {
             <ListItemText primary={t("Proxy Bypass")} />
             <TextField
               autoComplete="new-password"
+              error={value.bypass ? !validReg.test(value.bypass) : false}
               disabled={!enabled}
               size="small"
               multiline