diff --git a/source/threads.tex b/source/threads.tex
index 7b59b6c533..6a59070e5a 100644
--- a/source/threads.tex
+++ b/source/threads.tex
@@ -1,5 +1,5 @@
 %!TEX root = std.tex
-\rSec0[thread]{Thread support library}
+\rSec0[thread]{Concurrency support library}
 
 \rSec1[thread.general]{General}