diff --git a/site/static/docs/5.3/assets/js/color-modes.js b/site/static/docs/5.3/assets/js/color-modes.js
index 68717f82d6..4528ba36b8 100644
--- a/site/static/docs/5.3/assets/js/color-modes.js
+++ b/site/static/docs/5.3/assets/js/color-modes.js
@@ -29,6 +29,11 @@
 
   const showActiveTheme = (theme, focus = false) => {
     const themeSwitcher = document.querySelector('#bd-theme')
+
+    if (!themeSwitcher) {
+      return
+    }
+
     const themeSwitcherText = document.querySelector('#bd-theme-text')
     const activeThemeIcon = document.querySelector('.theme-icon-active use')
     const btnToActive = document.querySelector(`[data-bs-theme-value="${theme}"]`)