diff --git a/src/bootstrap/src/core/build_steps/tool.rs b/src/bootstrap/src/core/build_steps/tool.rs
index 0088e851d3975..41f83da13f4fb 100644
--- a/src/bootstrap/src/core/build_steps/tool.rs
+++ b/src/bootstrap/src/core/build_steps/tool.rs
@@ -716,7 +716,7 @@ impl Step for Rustdoc {
             && target_compiler.stage > 0
             && builder.rust_info().is_managed_git_subrepository()
         {
-            let files_to_track = &["src/librustdoc", "src/tools/rustdoc"];
+            let files_to_track = &["src/librustdoc", "src/tools/rustdoc", "src/rustdoc-json-types"];
 
             // Check if unchanged
             if !builder.config.has_changes_from_upstream(files_to_track) {