diff --git a/src/ep_resources.c b/src/ep_resources.c
index a84edb4..8ecf8e1 100644
--- a/src/ep_resources.c
+++ b/src/ep_resources.c
@@ -51,7 +51,7 @@ static PyObject *wrap_resource_file_handle(HRESFILE handle)
   return rc;
 }
 
-static PyObject *resfile_load_classmethod(ResFileType *cls, PyObject *args)
+static PyObject *resfile_load_classmethod(PyTypeObject *cls, PyObject *args)
 {
   const char *filename;
   PyObject *rc = NULL;