diff --git a/src/gevent/_gevent_cgreenlet.pxd b/src/gevent/_gevent_cgreenlet.pxd
index 246773e..fbc6107 100644
--- a/src/gevent/_gevent_cgreenlet.pxd
+++ b/src/gevent/_gevent_cgreenlet.pxd
@@ -16,12 +16,14 @@ cdef InvalidSwitchError
 cdef extern from "greenlet/greenlet.h":
 
     ctypedef class greenlet.greenlet [object PyGreenlet]:
-        # Defining this as a void* means we can't access it as a python attribute
-        # in the Python code; but we can't define it as a greenlet because that doesn't
-        # properly handle the case that it can be NULL. So instead we inline a getparent
-        # function that does the same thing as the green_getparent accessor but without
-        # going through the overhead of generic attribute lookup.
-        cdef void* parent
+        pass
+
+    # Defining this as a void* means we can't access it as a python attribute
+    # in the Python code; but we can't define it as a greenlet because that doesn't
+    # properly handle the case that it can be NULL. So instead we inline a getparent
+    # function that does the same thing as the green_getparent accessor but without
+    # going through the overhead of generic attribute lookup.
+    cdef void* PyGreenlet_GET_PARENT(greenlet s)
 
     # These are actually macros and so must be included
     # (defined) in each .pxd, as are the two functions
@@ -36,13 +38,13 @@ cdef inline greenlet getcurrent():
 cdef inline object get_generic_parent(greenlet s):
     # We don't use any typed functions on the return of this,
     # so save the type check by making it just an object.
-    if s.parent != NULL:
-        return <object>s.parent
+    if PyGreenlet_GET_PARENT(s) != NULL:
+        return <object>PyGreenlet_GET_PARENT(s)
 
 cdef inline SwitchOutGreenletWithLoop get_my_hub(greenlet s):
     # Must not be called with s = None
-    if s.parent != NULL:
-        return <object>s.parent
+    if PyGreenlet_GET_PARENT(s) != NULL:
+        return <object>PyGreenlet_GET_PARENT(s)
 
 cdef bint _greenlet_imported