diff --git a/docs/data/base/components/select/UnstyledSelectIntroduction/tailwind/index.js b/docs/data/base/components/select/UnstyledSelectIntroduction/tailwind/index.js
index 373c419fd123ab..a827c78b398922 100644
--- a/docs/data/base/components/select/UnstyledSelectIntroduction/tailwind/index.js
+++ b/docs/data/base/components/select/UnstyledSelectIntroduction/tailwind/index.js
@@ -162,7 +162,7 @@ const Select = React.forwardRef(function CustomSelect(props, ref) {
           return {
             ...resolvedSlotProps,
             className: clsx(
-              `${isDarkMode ? 'dark' : ''} z-10x`,
+              `${isDarkMode ? 'dark' : ''} z-10`,
               resolvedSlotProps?.className,
             ),
           };
diff --git a/docs/data/base/components/select/UnstyledSelectIntroduction/tailwind/index.tsx b/docs/data/base/components/select/UnstyledSelectIntroduction/tailwind/index.tsx
index 57b21ad8510cdc..1d5fad07676cde 100644
--- a/docs/data/base/components/select/UnstyledSelectIntroduction/tailwind/index.tsx
+++ b/docs/data/base/components/select/UnstyledSelectIntroduction/tailwind/index.tsx
@@ -181,7 +181,7 @@ const Select = React.forwardRef(function CustomSelect<
           return {
             ...resolvedSlotProps,
             className: clsx(
-              `${isDarkMode ? 'dark' : ''} z-10x`,
+              `${isDarkMode ? 'dark' : ''} z-10`,
               resolvedSlotProps?.className,
             ),
           };