diff --git a/cv_bridge/src/module_opencv4.cpp b/cv_bridge/src/module_opencv4.cpp
index ac93f089..085e77b1 100644
--- a/cv_bridge/src/module_opencv4.cpp
+++ b/cv_bridge/src/module_opencv4.cpp
@@ -6,8 +6,6 @@
 
 #include "opencv2/opencv_modules.hpp"
 
-#include "pycompat.hpp"
-
 static PyObject * opencv_error = 0;
 
 static int failmsg(const char * fmt, ...)
@@ -199,8 +197,8 @@ static bool pyopencv_to(PyObject * o, Mat & m, const ArgInfo info)
     return true;
   }
 
-  if (PyInt_Check(o) ) {
-    double v[] = {static_cast<double>(PyInt_AsLong(reinterpret_cast<PyObject *>(o))), 0., 0., 0.};
+  if (PyLong_Check(o) ) {
+    double v[] = {static_cast<double>(PyLong_AsLong(reinterpret_cast<PyObject *>(o))), 0., 0., 0.};
     m = Mat(4, 1, CV_64F, v).clone();
     return true;
   }
@@ -214,8 +212,8 @@ static bool pyopencv_to(PyObject * o, Mat & m, const ArgInfo info)
     m = Mat(sz, 1, CV_64F);
     for (i = 0; i < sz; i++) {
       PyObject * oi = PyTuple_GET_ITEM(o, i);
-      if (PyInt_Check(oi) ) {
-        m.at<double>(i) = static_cast<double>(PyInt_AsLong(oi));
+      if (PyLong_Check(oi) ) {
+        m.at<double>(i) = static_cast<double>(PyLong_AsLong(oi));
       } else if (PyFloat_Check(oi) ) {
         m.at<double>(i) = static_cast<double>(PyFloat_AsDouble(oi));
       } else {
diff --git a/cv_bridge/src/pycompat.hpp b/cv_bridge/src/pycompat.hpp
deleted file mode 100644
index 576d9300..00000000
--- a/cv_bridge/src/pycompat.hpp
+++ /dev/null
@@ -1,71 +0,0 @@
-/*M///////////////////////////////////////////////////////////////////////////////////////
-//
-//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
-//
-//  By downloading, copying, installing or using the software you agree to this license.
-//  If you do not agree to this license, do not download, install,
-//  copy or use the software.
-//
-//
-//                           License Agreement
-//                For Open Source Computer Vision Library
-//
-// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
-// Copyright (C) 2009-2011, Willow Garage Inc., all rights reserved.
-// Copyright (c) 2018 Intel Corporation.
-// Third party copyrights are property of their respective owners.
-//
-// Redistribution and use in source and binary forms, with or without modification,
-// are permitted provided that the following conditions are met:
-//
-//   * Redistribution's of source code must retain the above copyright notice,
-//     this list of conditions and the following disclaimer.
-//
-//   * Redistribution's in binary form must reproduce the above copyright notice,
-//     this list of conditions and the following disclaimer in the documentation
-//     and/or other materials provided with the distribution.
-//
-//   * The name of the copyright holders may not be used to endorse or promote products
-//     derived from this software without specific prior written permission.
-//
-// This software is provided by the copyright holders and contributors "as is" and
-// any express or implied warranties, including, but not limited to, the implied
-// warranties of merchantability and fitness for a particular purpose are disclaimed.
-// In no event shall the Intel Corporation or contributors be liable for any direct,
-// indirect, incidental, special, exemplary, or consequential damages
-// (including, but not limited to, procurement of substitute goods or services;
-// loss of use, data, or profits; or business interruption) however caused
-// and on any theory of liability, whether in contract, strict liability,
-// or tort (including negligence or otherwise) arising in any way out of
-// the use of this software, even if advised of the possibility of such damage.
-//
-//M*/
-
-// Defines for Python 2/3 compatibility.
-#ifndef PYCOMPAT_HPP_
-#define PYCOMPAT_HPP_
-
-#if PY_MAJOR_VERSION >= 3
-// Python3 treats all ints as longs, PyInt_X functions have been removed.
-#define PyInt_Check PyLong_Check
-#define PyInt_CheckExact PyLong_CheckExact
-#define PyInt_AsLong PyLong_AsLong
-#define PyInt_AS_LONG PyLong_AS_LONG
-#define PyInt_FromLong PyLong_FromLong
-#define PyNumber_Int PyNumber_Long
-
-// Python3 strings are unicode, these defines mimic the Python2 functionality.
-#define PyString_Check PyUnicode_Check
-#define PyString_FromString PyUnicode_FromString
-#define PyString_FromStringAndSize PyUnicode_FromStringAndSize
-#define PyString_Size PyUnicode_GET_SIZE
-
-// PyUnicode_AsUTF8 isn't available until Python 3.3
-#if (PY_VERSION_HEX < 0x03030000)
-#define PyString_AsString _PyUnicode_AsString
-#else
-#define PyString_AsString PyUnicode_AsUTF8
-#endif
-#endif
-
-#endif  // PYCOMPAT_HPP_