diff --git a/.gitignore b/.gitignore
index 6dad5718..8a40c93c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,3 +12,4 @@ __pycache__/
 /.ropeproject/
 /MANIFEST
 benchmarks/*.json
+.vscode
diff --git a/src/greenlet/greenlet_refs.hpp b/src/greenlet/greenlet_refs.hpp
index d109229b..7cf741ea 100644
--- a/src/greenlet/greenlet_refs.hpp
+++ b/src/greenlet/greenlet_refs.hpp
@@ -339,7 +339,7 @@ namespace greenlet {
             Py_XINCREF(other.p);
             const T* tmp = this->p;
             this->p = other.p;
-            Py_XDECREF(tmp);
+            Py_XDECREF(const_cast<T*>(tmp));
             return *this;
         }
 
@@ -851,7 +851,7 @@ namespace greenlet {
 
         void PyAddObject(const char* name, const PyObject* new_object)
         {
-            Py_INCREF(new_object);
+            Py_INCREF(const_cast<PyObject*>(new_object));
             try {
                 Require(PyModule_AddObject(this->p, name, const_cast<PyObject*>(new_object)));
             }