diff --git a/source/threads.tex b/source/threads.tex
index 545aecdb63..3ee6804cb1 100644
--- a/source/threads.tex
+++ b/source/threads.tex
@@ -13216,7 +13216,7 @@
 \indexlibraryglobal{rcu_retire}%
 \begin{itemdecl}
 template<class T, class D = default_delete<T>>
-void rcu_retire(T* p, D d = D(), rcu_domain& dom = rcu_default_domain());
+  void rcu_retire(T* p, D d = D(), rcu_domain& dom = rcu_default_domain());
 \end{itemdecl}
 
 \begin{itemdescr}