diff --git a/aio/tools/transforms/angular-base-package/processors/disambiguateDocPaths.js b/aio/tools/transforms/angular-base-package/processors/disambiguateDocPaths.js
index 2f3d01b624..0a070a26be 100644
--- a/aio/tools/transforms/angular-base-package/processors/disambiguateDocPaths.js
+++ b/aio/tools/transforms/angular-base-package/processors/disambiguateDocPaths.js
@@ -18,7 +18,7 @@
 module.exports = function disambiguateDocPathsProcessor(log) {
   return {
     $runAfter: ['paths-computed'],
-    $runBefore: ['rendering-docs'],
+    $runBefore: ['rendering-docs', 'createSitemap'],
     $process(docs) {
       // Collect all the ambiguous docs, whose outputPath is are only different by casing.
       const ambiguousDocMap = new Map();
diff --git a/aio/tools/transforms/angular-base-package/processors/disambiguateDocPaths.spec.js b/aio/tools/transforms/angular-base-package/processors/disambiguateDocPaths.spec.js
index 6bcd5995bc..22eae728c1 100644
--- a/aio/tools/transforms/angular-base-package/processors/disambiguateDocPaths.spec.js
+++ b/aio/tools/transforms/angular-base-package/processors/disambiguateDocPaths.spec.js
@@ -22,6 +22,10 @@ describe('disambiguateDocPaths processor', () => {
     expect(processor).toBeDefined();
   });
 
+  it('should be run before creating the sitemap', () => {
+    expect(processor.$runBefore).toContain('createSitemap');
+  });
+
   it('should create `disambiguator` documents for docs that have ambiguous outputPaths', () => {
     const numDocs = docs.length;
     processor.$process(docs);