diff --git a/Include/frameobject.h b/Include/frameobject.h
index 33f73af..0e7f32b 100644
--- a/Include/frameobject.h
+++ b/Include/frameobject.h
@@ -36,6 +36,8 @@
            non-generator frames. See the save_exc_state and swap_exc_state
            functions in ceval.c for details of their use. */
     PyObject *f_exc_type, *f_exc_value, *f_exc_traceback;
+    /* Borrowed referenced to a generator, or NULL */
+    PyObject *f_gen;
 
     PyThreadState *f_tstate;
     int f_lasti;                /* Last instruction if called */
@@ -84,6 +86,13 @@
 /* Return the line of code the frame is currently executing. */
 PyAPI_FUNC(int) PyFrame_GetLineNumber(PyFrameObject *);
 
+/* Generator support */
+PyAPI_FUNC(PyObject *) _PyFrame_YieldingFrom(PyFrameObject *);
+PyAPI_FUNC(PyObject *) _PyFrame_GeneratorSend(PyFrameObject *, PyObject *, int exc);
+PyAPI_FUNC(PyObject *) _PyFrame_Finalize(PyFrameObject *);
+PyAPI_FUNC(int) _PyFrame_CloseIterator(PyObject *);
+
+
 #ifdef __cplusplus
 }
 #endif