diff --git a/src/doc/rustc-dev-guide/book.toml b/src/doc/rustc-dev-guide/book.toml
index 917cddfc2dc0..a5d794b50619 100644
--- a/src/doc/rustc-dev-guide/book.toml
+++ b/src/doc/rustc-dev-guide/book.toml
@@ -18,6 +18,9 @@ git-repository-url = "https://github.com/rust-lang/rustc-dev-guide"
 edit-url-template = "https://github.com/rust-lang/rustc-dev-guide/edit/master/{path}"
 additional-js = ["mermaid.min.js", "mermaid-init.js"]
 
+[output.html.search]
+use-boolean-and = true
+
 [output.html.fold]
 enable = true
 level = 0