diff --git a/.changeset/theme-toggle-aria.md b/.changeset/theme-toggle-aria.md
new file mode 100644
index 0000000000000..c2394381f5aca
--- /dev/null
+++ b/.changeset/theme-toggle-aria.md
@@ -0,0 +1,5 @@
+---
+'@node-core/ui-components': patch
+---
+
+Add a default `aria-label` to `ThemeToggle`.
diff --git a/packages/ui-components/src/Common/ThemeToggle/index.tsx b/packages/ui-components/src/Common/ThemeToggle/index.tsx
index 923aba5f90d16..401f1472e4bad 100644
--- a/packages/ui-components/src/Common/ThemeToggle/index.tsx
+++ b/packages/ui-components/src/Common/ThemeToggle/index.tsx
@@ -30,7 +30,7 @@ const themes: Array<Theme> = ['system', 'light', 'dark'];
 const ThemeToggle: FC<ThemeToggleProps> = ({
   onChange = () => {},
   currentTheme = 'system',
-  ariaLabel,
+  ariaLabel = 'Select theme',
   themeLabels = { system: 'System', light: 'Light', dark: 'Dark' },
 }) => {
   const TriggerIcon = themeIcons[currentTheme];