diff --git a/reference/pthreads/collectable/isgarbage.xml b/reference/pthreads/collectable/isgarbage.xml
index e41a652ee7..af4d94504a 100644
--- a/reference/pthreads/collectable/isgarbage.xml
+++ b/reference/pthreads/collectable/isgarbage.xml
@@ -10,7 +10,7 @@
  <refsect1 role="description">
   &reftitle.description;
   <methodsynopsis>
-   <modifier>public</modifier><type>void</type><methodname>Collectable::isGarbage</methodname>
+   <modifier>public</modifier><type>bool</type><methodname>Collectable::isGarbage</methodname>
    <void/>
   </methodsynopsis>
   <para>