diff --git a/numpy/f2py/rules.py b/numpy/f2py/rules.py
index bf7b46c89f08..84137811a446 100644
--- a/numpy/f2py/rules.py
+++ b/numpy/f2py/rules.py
@@ -245,6 +245,11 @@
     if (! PyErr_Occurred())
         on_exit(f2py_report_on_exit,(void*)\"#modulename#\");
 #endif
+
+    if (PyType_Ready(&PyFortran_Type) < 0) {
+        return NULL;
+    }
+
     return m;
 }
 #ifdef __cplusplus