diff --git a/Modules/gdbmmodule.c b/Modules/gdbmmodule.c
index 86f98c0..9e1b01d 100644
--- a/Modules/gdbmmodule.c
+++ b/Modules/gdbmmodule.c
@@ -36,7 +36,7 @@
 
 static PyTypeObject Dbmtype;
 
-#define is_dbmobject(v) (Py_Type(v) == &Dbmtype)
+#define is_dbmobject(v) (Py_TYPE(v) == &Dbmtype)
 #define check_dbmobject_open(v) if ((v)->di_dbm == NULL) \
     { PyErr_SetString(DbmError, "GDBM object has already been closed"); \
       return NULL; }