diff --git a/Doc/c-api/init.rst b/Doc/c-api/init.rst
--- a/Doc/c-api/init.rst
+++ b/Doc/c-api/init.rst
@@ -908,7 +908,7 @@
 main thread where it has possession of the global interpreter lock and can
 perform any Python API calls.
 
-.. c:function:: void Py_AddPendingCall(int (*func)(void *), void *arg)
+.. c:function:: int Py_AddPendingCall(int (*func)(void *), void *arg)
 
    .. index:: single: Py_AddPendingCall()