diff --git a/Python/random.c b/Python/random.c
index a2ae002..825260f 100644
--- a/Python/random.c
+++ b/Python/random.c
@@ -165,7 +165,8 @@
     Py_END_ALLOW_THREADS
     if (fd < 0)
     {
-        PyErr_SetFromErrnoWithFilename(PyExc_OSError, "/dev/urandom");
+        PyErr_SetString(PyExc_NotImplementedError,
+                        "/dev/urandom (or equivalent) not found");
         return -1;
     }