diff --git a/Include/internal/pycore_pylifecycle.h b/Include/internal/pycore_pylifecycle.h
index cf844cc063f..cdf5c09a426 100644
--- a/Include/internal/pycore_pylifecycle.h
+++ b/Include/internal/pycore_pylifecycle.h
@@ -84,7 +84,7 @@ extern void _PyUnicode_Fini(void);
 extern void _PyLong_Fini(void);
 extern void _PyFaulthandler_Fini(void);
 extern void _PyHash_Fini(void);
-extern int _PyTraceMalloc_Fini(void);
+extern void _PyTraceMalloc_Fini(void);
 extern void _PyWarnings_Fini(PyInterpreterState *interp);
 
 extern void _PyGILState_Init(