diff --git a/src/if_python3.c b/src/if_python3.c
index fd117f0..1045b84 100644
--- a/src/if_python3.c
+++ b/src/if_python3.c
@@ -219,16 +219,9 @@
 # define PyObject_GetItem py3_PyObject_GetItem
 # define PyObject_IsTrue py3_PyObject_IsTrue
 # define PyModule_GetDict py3_PyModule_GetDict
-# if defined(USE_LIMITED_API) \
-    && (Py_LIMITED_API+0 >= 0x030c0000 || defined(Py_REF_DEBUG))
-#  undef Py_INCREF
-#  if Py_LIMITED_API+0 >= 0x030a00A7
-#   define _Py_IncRef py3__Py_IncRef
-#   define Py_INCREF _Py_IncRef
-#  else
-#   define Py_IncRef py3_Py_IncRef
-#   define Py_INCREF Py_IncRef
-#  endif
+# ifdef USE_LIMITED_API
+#  define Py_IncRef py3_Py_IncRef
+#  define Py_DecRef py3_Py_DecRef
 # endif
 # ifdef USE_LIMITED_API
 #  define Py_CompileString py3_Py_CompileString
@@ -403,14 +396,9 @@
 static void (*py3_PyErr_SetString)(PyObject *, const char *);
 static void (*py3_PyErr_SetObject)(PyObject *, PyObject *);
 static int (*py3_PyErr_ExceptionMatches)(PyObject *);
-# if defined(USE_LIMITED_API) \
-    && (Py_LIMITED_API+0 >= 0x030c0000 || defined(Py_REF_DEBUG))
-#  if Py_LIMITED_API+0 >= 0x030a00A7
-#   define _Py_IncRef py3__Py_IncRef
-static void (*py3__Py_IncRef)(PyObject *);
-#  else
+# ifdef USE_LIMITED_API
 static void (*py3_Py_IncRef)(PyObject *);
-#  endif
+static void (*py3_Py_DecRef)(PyObject *);
 # endif
 # ifdef USE_LIMITED_API
 static PyObject* (*py3_Py_CompileString)(const char *, const char *, int);
@@ -619,13 +607,9 @@
     {"PyErr_SetString", (PYTHON_PROC*)&py3_PyErr_SetString},
     {"PyErr_SetObject", (PYTHON_PROC*)&py3_PyErr_SetObject},
     {"PyErr_ExceptionMatches", (PYTHON_PROC*)&py3_PyErr_ExceptionMatches},
-# if defined(USE_LIMITED_API) \
-    && (Py_LIMITED_API+0 >= 0x030c0000 || defined(Py_REF_DEBUG))
-#  if Py_LIMITED_API+0 >= 0x030a00A7
-    {"_Py_IncRef", (PYTHON_PROC*)&py3__Py_IncRef},
-#  else
+# ifdef USE_LIMITED_API
     {"Py_IncRef", (PYTHON_PROC*)&py3_Py_IncRef},
-#  endif
+    {"Py_DecRef", (PYTHON_PROC*)&py3_Py_DecRef},
 # endif
 # ifdef USE_LIMITED_API
     {"Py_CompileString", (PYTHON_PROC*)&py3_Py_CompileString},
@@ -803,18 +787,18 @@
 #  define Py_XDECREF(op) py3__Py_XDECREF(_PyObject_CAST(op))
 # endif
 
-# if defined(USE_LIMITED_API) \
-    && (Py_LIMITED_API+0 >= 0x030c0000 || defined(Py_REF_DEBUG))
-    static inline void
-py3__Py_XINCREF(PyObject *op)
-{
-    if (op != NULL)
-    {
-	Py_INCREF(op);
-    }
-}
+# ifdef USE_LIMITED_API
+// Use stable versions of inc/dec ref. Note that these always null-check and
+// therefore there's no difference between XINCREF and INCREF.
+#  undef Py_INCREF
+#  define Py_INCREF(obj) Py_IncRef((PyObject *)obj)
 #  undef Py_XINCREF
-#  define Py_XINCREF(op) py3__Py_XINCREF(_PyObject_CAST(op))
+#  define Py_XINCREF(obj) Py_IncRef((PyObject *)obj)
+
+#  undef Py_DECREF
+#  define Py_DECREF(obj) Py_DecRef((PyObject *)obj)
+#  undef Py_XDECREF
+#  define Py_XDECREF(obj) Py_DecRef((PyObject *)obj)
 # endif
 
 # if PY_VERSION_HEX >= 0x030900b0