bpo-39573: Clean up modules and headers to use Py_IS_TYPE() function (GH-18521)
diff --git a/Modules/_dbmmodule.c b/Modules/_dbmmodule.c
index 072e977..80a0503 100644
--- a/Modules/_dbmmodule.c
+++ b/Modules/_dbmmodule.c
@@ -45,7 +45,7 @@
static PyTypeObject Dbmtype;
-#define is_dbmobject(v) (Py_TYPE(v) == &Dbmtype)
+#define is_dbmobject(v) Py_IS_TYPE(v, &Dbmtype)
#define check_dbmobject_open(v) if ((v)->di_dbm == NULL) \
{ PyErr_SetString(DbmError, "DBM object has already been closed"); \
return NULL; }