diff --git a/packages/mdx/mdx-ast-to-mdx-hast.js b/packages/mdx/mdx-ast-to-mdx-hast.js
index c7c5b28ea..9c9ff2c86 100644
--- a/packages/mdx/mdx-ast-to-mdx-hast.js
+++ b/packages/mdx/mdx-ast-to-mdx-hast.js
@@ -29,12 +29,12 @@ module.exports = function mdxAstToMdxHast() {
         if (lang) {
           props.className = ['language-' + lang]
         }
-
-        props.metaString = node.lang && node.lang.replace(langRegex, '').trim()
+        
+        props.metastring = node.lang && node.lang.replace(langRegex, '').trim()
 
         const meta =
-          props.metaString &&
-          props.metaString.split(' ').reduce((acc, cur) => {
+          props.metastring &&
+          props.metastring.split(' ').reduce((acc, cur) => {
             if (cur.split('=').length > 1) {
               const t = cur.split('=')
               acc[t[0]] = t[1]
diff --git a/packages/mdx/test/index.test.js b/packages/mdx/test/index.test.js
index 239172471..37251bcdb 100644
--- a/packages/mdx/test/index.test.js
+++ b/packages/mdx/test/index.test.js
@@ -82,7 +82,7 @@ COPY start.sh /home/start.sh
   )
 
   expect(result).toContain(
-    `props={{"className":"language-dockerfile","metaString":"exec registry=something.com","exec":true,"registry":"something.com"}}`
+    `props={{"className":"language-dockerfile","metastring":"exec registry=something.com","exec":true,"registry":"something.com"}}`
   )
 })