added decl for PyComplex_AsCComplex
diff --git a/Include/complexobject.h b/Include/complexobject.h
index 09a8683..93d243e 100644
--- a/Include/complexobject.h
+++ b/Include/complexobject.h
@@ -42,6 +42,7 @@
 
 extern double PyComplex_RealAsDouble Py_PROTO((PyObject *op));
 extern double PyComplex_ImagAsDouble Py_PROTO((PyObject *op));
+extern complex PyComplex_AsCComplex Py_PROTO((PyObject *op));
 
 #ifdef __cplusplus
 }