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-rw-r--r--Modules/_ctypes/malloc_closure.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/Modules/_ctypes/malloc_closure.c b/Modules/_ctypes/malloc_closure.c
index 29e9f4c4b2..4cd5dd6f5a 100644
--- a/Modules/_ctypes/malloc_closure.c
+++ b/Modules/_ctypes/malloc_closure.c
@@ -1,3 +1,7 @@
+/*****************************************************************
+ This file should be kept compatible with Python 2.3, see PEP 291.
+ *****************************************************************/
+
#include <Python.h>
#include <ffi.h>
#ifdef MS_WIN32