diff --git a/src/bootstrap/lib.rs b/src/bootstrap/lib.rs
index 2960dd3df6bf4..1ea29a829c270 100644
--- a/src/bootstrap/lib.rs
+++ b/src/bootstrap/lib.rs
@@ -1366,7 +1366,7 @@ impl Build {
                 eprintln!(
                     "
 Couldn't find required command: ninja
-You should install ninja, or set ninja=false in config.toml
+You should install ninja, or set `ninja=false` in config.toml in the `[llvm]` section.
 "
                 );
                 std::process::exit(1);