diff --git a/src/bootstrap/doc.rs b/src/bootstrap/doc.rs
index c4b3e4cf95d..30d690c9705 100644
--- a/src/bootstrap/doc.rs
+++ b/src/bootstrap/doc.rs
@@ -626,6 +626,7 @@ fn run(self, builder: &Builder<'_>) {
         // Only include compiler crates, no dependencies of those, such as `libc`.
         cargo.arg("--no-deps");
         cargo.arg("-p").arg("rustdoc");
+        cargo.arg("-p").arg("rustdoc-json-types");
 
         cargo.rustdocflag("--document-private-items");
         cargo.rustdocflag("--enable-index-page");