diff --git a/reference/pthreads/collectable/setgarbage.xml b/reference/pthreads/collectable/setgarbage.xml
index fdc4ff3cdf..f321ca96c0 100644
--- a/reference/pthreads/collectable/setgarbage.xml
+++ b/reference/pthreads/collectable/setgarbage.xml
@@ -7,6 +7,14 @@
   <refpurpose>Mark an object as garbage</refpurpose>
  </refnamediv>
 
+ <refsynopsisdiv>
+  <warning>
+   <para>
+    This method has been removed in pthreads v3.
+   </para>
+  </warning>
+ </refsynopsisdiv>
+
  <refsect1 role="description">
   &reftitle.description;
   <methodsynopsis>