diff --git a/src/python/_rpitxmodule.c b/src/python/_rpitxmodule.c
index 81f4779..fa65fb6 100644
--- a/src/python/_rpitxmodule.c
+++ b/src/python/_rpitxmodule.c
@@ -105,7 +105,7 @@ static PyObject*
 _rpitx_broadcast_fm(PyObject* self, PyObject* args) {
 	float frequency;
 
-    assert(sizeof(sampleBase) == sizeof(unsigned long));
+	assert(sizeof(sampleBase) == sizeof(unsigned long));
 	if (!PyArg_ParseTuple(args, "Lif", &sampleBase, &sampleLength, &frequency)) {
 		PyErr_SetString(rpitxError, "Invalid arguments");
 		return NULL;
diff --git a/src/python/rpitx/_hidden.py b/src/python/rpitx/_hidden.py
index 2c0e4dd..fd900d2 100644
--- a/src/python/rpitx/_hidden.py
+++ b/src/python/rpitx/_hidden.py
@@ -5,7 +5,6 @@ import StringIO
 import _rpitx
 import array
 import logging
-import sys
 import wave