diff --git a/Include/pythonrun.h b/Include/pythonrun.h
index faf930f..b9da550 100644
--- a/Include/pythonrun.h
+++ b/Include/pythonrun.h
@@ -148,6 +148,7 @@
 PyAPI_FUNC(void) PyByteArray_Fini(void);
 PyAPI_FUNC(void) PyFloat_Fini(void);
 PyAPI_FUNC(void) PyOS_FiniInterrupts(void);
+PyAPI_FUNC(void) _PyGC_Fini(void);
 
 /* Stuff with no proper home (yet) */
 PyAPI_FUNC(char *) PyOS_Readline(FILE *, FILE *, char *);