diff -r 86c96f187eed Modules/fpetestmodule.c
--- a/Modules/fpetestmodule.c	Thu Aug 16 10:29:34 2012 +0200
+++ b/Modules/fpetestmodule.c	Thu Aug 16 10:36:06 2012 +0200
@@ -43,7 +43,37 @@
 
 #include "Python.h"
 
-static PyObject *fpe_error;
+typedef struct {
+  PyObject *fpe_error;
+} fpeteststate;
+
+
+#define fpetest_state(o) ((fpeteststate *)PyModule_GetState(o))
+
+static int
+fpetest_clear(PyObject *m)
+{
+   Py_CLEAR(fpetest_state(m)->fpe_error);
+   return 0;
+}
+
+static int
+fpetest_traverse(PyObject *m, visitproc visit, void *arg)
+{
+    Py_VISIT(fpetest_state(m)->fpe_error);
+    return 0;
+}
+
+static void
+fpetest_free(void *m)
+{
+    fpetest_clear((PyObject *)m);
+}
+
+static PyModuleDef fpetestmodule;
+
+#define fpeteststate_global ((fpeteststate *)PyModule_GetState(PyState_FindModule(&fpetestmodule)))
+
 
 PyMODINIT_FUNC PyInit_fpetest(void);
 static PyObject *test(PyObject *self,PyObject *args);
@@ -177,12 +207,12 @@
     PyModuleDef_HEAD_INIT,
     "fpetest",
     NULL,
-    -1,
+    sizeof(fpeteststate),
     fpetest_methods,
     NULL,
-    NULL,
-    NULL,
-    NULL
+    fpetest_traverse,
+    fpetest_clear,
+    fpetest_free
 };
 
 PyMODINIT_FUNC PyInit_fpetest(void)
@@ -191,10 +221,10 @@
 
     m = PyModule_Create(&fpetestmodule);
     if (m == NULL)
-    return NULL;
+        return NULL;
     d = PyModule_GetDict(m);
-    fpe_error = PyErr_NewException("fpetest.error", NULL, NULL);
-    if (fpe_error != NULL)
-        PyDict_SetItemString(d, "error", fpe_error);
+    fpetest_state(m)->fpe_error = PyErr_NewException("fpetest.error", NULL, NULL);
+    if (fpetest_state(m)->fpe_error != NULL)
+        PyDict_SetItemString(d, "error", fpetest_state(m)->fpe_error);
     return m;
 }