diff --git a/Doc/lib/libweakref.tex b/Doc/lib/libweakref.tex
index d56f1cb..fda27d2 100644
--- a/Doc/lib/libweakref.tex
+++ b/Doc/lib/libweakref.tex
@@ -234,7 +234,7 @@
 PyTypeObject PyInstance_Type = {
     PyObject_HEAD_INIT(&PyType_Type)
     0,
-    "instance",
+    "module.instance",
 
     /* Lots of stuff omitted for brevity... */