diff --git a/CXX/Python2/IndirectPythonInterface.hxx b/CXX/Python2/IndirectPythonInterface.hxx
index e2ee725..1c7cc24 100644
--- a/CXX/Python2/IndirectPythonInterface.hxx
+++ b/CXX/Python2/IndirectPythonInterface.hxx
@@ -153,7 +153,7 @@ int &_Py_VerboseFlag();
 void _XINCREF( PyObject *op );
 void _XDECREF( PyObject *op );
 
-char *__Py_PackageContext();
+const char *__Py_PackageContext();
 }
 
 #endif    // __CXX_INDIRECT_PYTHON_INTERFACE__HXX__
diff --git a/CXX/Python3/IndirectPythonInterface.hxx b/CXX/Python3/IndirectPythonInterface.hxx
index 6163536..9807b2e 100644
--- a/CXX/Python3/IndirectPythonInterface.hxx
+++ b/CXX/Python3/IndirectPythonInterface.hxx
@@ -149,7 +149,7 @@ int &_Py_UnicodeFlag();
 void _XINCREF( PyObject *op );
 void _XDECREF( PyObject *op );
 
-char *__Py_PackageContext();
+const char *__Py_PackageContext();
 };
 
 #endif    // __CXX_INDIRECT_PYTHON_INTERFACE__HXX__
diff --git a/Src/IndirectPythonInterface.cxx b/Src/IndirectPythonInterface.cxx
index de0ca7f..b7d7d9e 100644
--- a/Src/IndirectPythonInterface.cxx
+++ b/Src/IndirectPythonInterface.cxx
@@ -348,7 +348,7 @@ PyTypeObject *_CObject_Type()           { return ptr__CObject_Type; }
 PyTypeObject *_Bytes_Type()             { return ptr__Bytes_Type; }
 #endif
 
-char *__Py_PackageContext()             { return *ptr__Py_PackageContext; }
+const char *__Py_PackageContext()             { return *ptr__Py_PackageContext; }
 
 
 //
@@ -468,7 +468,7 @@ int &_Py_InteractiveFlag()              { return Py_InteractiveFlag; }
 int &_Py_OptimizeFlag()                 { return Py_OptimizeFlag; }
 int &_Py_NoSiteFlag()                   { return Py_NoSiteFlag; }
 int &_Py_VerboseFlag()                  { return Py_VerboseFlag; }
-char *__Py_PackageContext()             { return _Py_PackageContext; }
+const char *__Py_PackageContext()             { return _Py_PackageContext; }
 
 //
 //    Needed to keep the abstactions for delayload interface