diff --git a/pyracf/common/irrsmo00.c b/pyracf/common/irrsmo00.c
index cae318d..2ae691b 100644
--- a/pyracf/common/irrsmo00.c
+++ b/pyracf/common/irrsmo00.c
@@ -96,7 +96,7 @@ static PyObject *call_irrsmo00(PyObject *self, PyObject *args, PyObject *kwargs)
             req_handle,
             running_userid_struct,
             acee,
-            result_len,
+            &result_len,
             result_buffer);
         if ( i == 0 ) {
             full_result = PyList_New(1);