diff --git a/packages/docusaurus-theme-common/src/internal.ts b/packages/docusaurus-theme-common/src/internal.ts
index b1c116a0c6ea..d8d5821c95f8 100644
--- a/packages/docusaurus-theme-common/src/internal.ts
+++ b/packages/docusaurus-theme-common/src/internal.ts
@@ -39,6 +39,14 @@ export {
   getPrismCssVariables,
   CodeBlockContextProvider,
   useCodeBlockContext,
+
+  // TODO Docusaurus v4: remove, only kept for internal retro-compatibility
+  //  See https://github.com/facebook/docusaurus/pull/11153
+  parseCodeBlockTitle,
+  parseClassNameLanguage as parseLanguage,
+  parseLines,
+  getLineNumbersStart,
+  containsLineNumbers,
 } from './utils/codeBlockUtils';
 
 export {DEFAULT_SEARCH_TAG} from './utils/searchUtils';
diff --git a/packages/docusaurus-theme-common/src/utils/codeBlockUtils.tsx b/packages/docusaurus-theme-common/src/utils/codeBlockUtils.tsx
index 914fc5de3557..fc18e4d44b57 100644
--- a/packages/docusaurus-theme-common/src/utils/codeBlockUtils.tsx
+++ b/packages/docusaurus-theme-common/src/utils/codeBlockUtils.tsx
@@ -188,6 +188,12 @@ export function getLineNumbersStart({
   return getMetaLineNumbersStart(metastring);
 }
 
+// TODO Docusaurus v4: remove, only kept for internal retro-compatibility
+//  See https://github.com/facebook/docusaurus/pull/11153
+export function containsLineNumbers(metastring?: string): boolean {
+  return Boolean(metastring?.includes('showLineNumbers'));
+}
+
 type ParseCodeLinesParam = {
   /**
    * The full metastring, as received from MDX. Line ranges declared here