diff --git a/mirage/imgfuncs.c b/mirage/imgfuncs.c
index 88621c6..bd97e98 100644
--- a/mirage/imgfuncs.c
+++ b/mirage/imgfuncs.c
@@ -1,3 +1,4 @@
+#define PY_SSIZE_T_CLEAN
 #include "Python.h"
 /**
  * copy length chars from source to dest
@@ -14,7 +15,7 @@ PyObject *rotate_right(PyObject *self, PyObject *args)
 {
 	char *a1;
 	char *a2;
-	int length;
+	Py_ssize_t length;
 	int w1, w2;
 	int h1, h2;
 	int rws1, rws2;
@@ -61,7 +62,7 @@ PyObject *rotate_left(PyObject *self, PyObject *args)
 {
 	char *a1;
 	char *a2;
-	int length;
+	Py_ssize_t length;
 	int w1, w2;
 	int h1, h2;
 	int rws1, rws2;
@@ -108,7 +109,7 @@ PyObject *rotate_mirror(PyObject *self, PyObject *args)
 {
 	char *a1;
 	char *a2;
-	int length;
+	Py_ssize_t length;
 	int w1, w2;
 	int h1, h2;
 	int rws1, rws2;
@@ -151,7 +152,7 @@ PyObject *flip_vert(PyObject *self, PyObject *args)
 {
 	char *a1;
 	char *a2;
-	int length;
+	Py_ssize_t length;
 	int w1, w2;
 	int h1, h2;
 	int rws1, rws2;
@@ -194,7 +195,7 @@ PyObject *flip_horiz(PyObject *self, PyObject *args)
 {
 	char *a1;
 	char *a2;
-	int length;
+	Py_ssize_t length;
 	int w1, w2;
 	int h1, h2;
 	int rws1, rws2;
diff --git a/mirage/xmouse.c b/mirage/xmouse.c
index 0309676..c368300 100644
--- a/mirage/xmouse.c
+++ b/mirage/xmouse.c
@@ -1,3 +1,4 @@
+#define PY_SSIZE_T_CLEAN
 #include <Python.h>
 #include <X11/Xlib.h>
 
@@ -39,6 +40,7 @@ static PyMethodDef methods[] =
 {
     {"geometry", xmouse_geometry, METH_VARARGS,
      "Get the geometry of the window under the mouse cursor."},
+    {NULL, NULL, 0}
 };
 
 static PyModuleDef xmouse_module = {