Issue #17162: Add PyType_GetSlot.
diff --git a/setup.py b/setup.py
index 448d605..8269e1c 100644
--- a/setup.py
+++ b/setup.py
@@ -1539,7 +1539,7 @@
 
         if 'd' not in sys.abiflags:
             ext = Extension('xxlimited', ['xxlimited.c'],
-                            define_macros=[('Py_LIMITED_API', 1)])
+                            define_macros=[('Py_LIMITED_API', '0x03040000')])
             self.extensions.append(ext)
 
         return missing