python-postgres
diff --git a/‎postgresql/protocol/optimized/typio.c‎
Lines changed: 2 additions & 2 deletions b/‎postgresql/protocol/optimized/typio.c‎
Lines changed: 2 additions & 2 deletions
@@ -395,7 +395,7 @@ process_tuple(PyObject *self, PyObject *args)
 	if (!PyArg_ParseTuple(args, "OOO", &procs, &tup, &fail))
 		return(NULL);
 
-	if (!PyObject_IsInstance(procs, (PyObject *) &PyTuple_Type))
+	if (!PyTuple_CheckExact(procs))
 	{
 		PyErr_SetString(
 			PyExc_TypeError,
@@ -404,7 +404,7 @@ process_tuple(PyObject *self, PyObject *args)
 		return(NULL);
 	}
 
-	if (!PyObject_IsInstance(tup, (PyObject *) &PyTuple_Type))
+	if (!PyTuple_Check(tup))
 	{
 		PyErr_SetString(
 			PyExc_TypeError,
Original file line number	Diff line number	Diff line change
`@@ -395,7 +395,7 @@ process_tuple(PyObject self, PyObject args)`
`395`	`395`	`if (!PyArg_ParseTuple(args, "OOO", &procs, &tup, &fail))`
`396`	`396`	`return(NULL);`
`397`	`397`
`398`		`- if (!PyObject_IsInstance(procs, (PyObject *) &PyTuple_Type))`
	`398`	`+ if (!PyTuple_CheckExact(procs))`
`399`	`399`	`{`
`400`	`400`	`PyErr_SetString(`
`401`	`401`	`PyExc_TypeError,`
`@@ -404,7 +404,7 @@ process_tuple(PyObject self, PyObject args)`
`404`	`404`	`return(NULL);`
`405`	`405`	`}`
`406`	`406`
`407`		`- if (!PyObject_IsInstance(tup, (PyObject *) &PyTuple_Type))`
	`407`	`+ if (!PyTuple_Check(tup))`
`408`	`408`	`{`
`409`	`409`	`PyErr_SetString(`
`410`	`410`	`PyExc_TypeError,`