diff --git a/Include/pytime.h b/Include/pytime.h
index 0473dc7..221279b 100644
--- a/Include/pytime.h
+++ b/Include/pytime.h
@@ -44,6 +44,10 @@
     PyObject *obj,
     time_t *sec);
 
+/* Convert a time_t to a PyLong. */
+PyAPI_FUNC(PyObject *) _PyLong_FromTime_t(
+    time_t sec);
+
 /* Convert a number of seconds, int or float, to a timeval structure.
    usec is in the range [0; 999999] and rounded towards zero.
    For example, -1.2 is converted to (-2, 800000). */