diff --git a/bindings/python/pyzmq.cpp b/bindings/python/pyzmq.cpp
index 7a53c8e6..7a1905a5 100644
--- a/bindings/python/pyzmq.cpp
+++ b/bindings/python/pyzmq.cpp
@@ -465,7 +465,7 @@ PyMODINIT_FUNC initlibpyzmq ()
     assert (rc == 0);
 
     PyObject *module = Py_InitModule3 ("libpyzmq", module_methods,
-        libpyzmq_doc);
+        (char*) libpyzmq_doc);
     if (!module)
         return;