diff --git a/Mac/Modules/ctl/Ctlmodule.c b/Mac/Modules/ctl/Ctlmodule.c
index 3648a554d5c..461d9459965 100644
--- a/Mac/Modules/ctl/Ctlmodule.c
+++ b/Mac/Modules/ctl/Ctlmodule.c
@@ -1196,7 +1196,7 @@ static PyObject *CtlObj_SetControlDataHandle(_self, _args)
 	if (!PyArg_ParseTuple(_args, "hO&O&",
 	                      &inPart,
 	                      PyMac_GetOSType, &inTagName,
-	                      OptResObj_Convert, buffer))
+	                      OptResObj_Convert, &buffer))
 		return NULL;
 
 	_err = SetControlData(_self->ob_itself,
diff --git a/Mac/Modules/ctl/ctlsupport.py b/Mac/Modules/ctl/ctlsupport.py
index 8ac9d5c5431..9829dcd6e0e 100644
--- a/Mac/Modules/ctl/ctlsupport.py
+++ b/Mac/Modules/ctl/ctlsupport.py
@@ -343,7 +343,7 @@ def outputCleanupStructMembers(self):
 if (!PyArg_ParseTuple(_args, "hO&O&",
                       &inPart,
                       PyMac_GetOSType, &inTagName,
-                      OptResObj_Convert, buffer))
+                      OptResObj_Convert, &buffer))
 	return NULL;
 
 _err = SetControlData(_self->ob_itself,