diff --git a/CHANGELOG.md b/CHANGELOG.md
index d27c136a3..6da0abdca 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@ This document follows the conventions laid out in [Keep a CHANGELOG][].
## [Unreleased][]
### Added
+- Added Python 3 buffer api support and PyBuffer interface for fast byte and numpy array read/write ([#980][p980])
### Changed
- Drop support for Python 2, 3.4, and 3.5
@@ -51,7 +52,6 @@ This version improves performance on benchmarks significantly compared to 2.3.
- Support for Python 3.8
- Codecs as the designated way to handle automatic conversions between
.NET and Python types
-- Added Python 3 buffer api support and PyBuffer interface for fast byte and numpy array read/write ([#980][p980])
### Changed
diff --git a/src/runtime/runtime.cs b/src/runtime/runtime.cs
index 915e1db00..f00b18a68 100644
--- a/src/runtime/runtime.cs
+++ b/src/runtime/runtime.cs
@@ -1154,6 +1154,8 @@ internal static long PyObject_Size(IntPtr pointer)
//====================================================================
// Python buffer API
//====================================================================
+ [DllImport(_PythonDll, CallingConvention = CallingConvention.Cdecl)]
+ internal static extern int PyObject_CheckBuffer(IntPtr obj);
[DllImport(_PythonDll, CallingConvention = CallingConvention.Cdecl)]
internal static extern int PyObject_GetBuffer(IntPtr exporter, ref Py_buffer view, int flags);
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