Issue #1545463: Global variables caught in reference cycles are now garbage-collected at shutdown.
diff --git a/Include/pythonrun.h b/Include/pythonrun.h
index e8a582d..66766dd 100644
--- a/Include/pythonrun.h
+++ b/Include/pythonrun.h
@@ -217,6 +217,7 @@
 PyAPI_FUNC(void) PyByteArray_Fini(void);
 PyAPI_FUNC(void) PyFloat_Fini(void);
 PyAPI_FUNC(void) PyOS_FiniInterrupts(void);
+PyAPI_FUNC(void) _PyGC_DumpShutdownStats(void);
 PyAPI_FUNC(void) _PyGC_Fini(void);
 PyAPI_FUNC(void) PySlice_Fini(void);
 PyAPI_FUNC(void) _PyType_Fini(void);