diff --git a/docs/modules/ROOT/pages/cops.adoc b/docs/modules/ROOT/pages/cops.adoc
index ada6362..f868ec7 100644
--- a/docs/modules/ROOT/pages/cops.adoc
+++ b/docs/modules/ROOT/pages/cops.adoc
@@ -5,4 +5,4 @@
 * xref:cops_threadsafety.adoc#threadsafetymutableclassinstancevariable[ThreadSafety/MutableClassInstanceVariable]
 * xref:cops_threadsafety.adoc#threadsafetynewthread[ThreadSafety/NewThread]
 * xref:cops_threadsafety.adoc#threadsafetydirchdir[ThreadSafety/DirChdir]
-* xref:cops_threadsafety.adoc#threadsafetydirchdir[ThreadSafety/RackMiddlewareInstanceVariable]
+* xref:cops_threadsafety.adoc#threadsafetyrackmiddlewareinstancevariable[ThreadSafety/RackMiddlewareInstanceVariable]