diff --git a/src/if_python3.c b/src/if_python3.c
index ebf402a..71de389 100644
--- a/src/if_python3.c
+++ b/src/if_python3.c
@@ -1030,7 +1030,7 @@
     } else if (PySlice_Check(idx)) {
 	Py_ssize_t start, stop, step, slicelen;
 
-	if (PySlice_GetIndicesEx((PySliceObject *)idx,
+	if (PySlice_GetIndicesEx((PyObject *)idx,
 	      (Py_ssize_t)((BufferObject *)(self))->buf->b_ml.ml_line_count+1,
 	      &start, &stop,
 	      &step, &slicelen) < 0) {
@@ -1054,7 +1054,7 @@
     } else if (PySlice_Check(idx)) {
 	Py_ssize_t start, stop, step, slicelen;
 
-	if (PySlice_GetIndicesEx((PySliceObject *)idx,
+	if (PySlice_GetIndicesEx((PyObject *)idx,
 	      (Py_ssize_t)((BufferObject *)(self))->buf->b_ml.ml_line_count+1,
 	      &start, &stop,
 	      &step, &slicelen) < 0) {
@@ -1142,7 +1142,7 @@
     } else if (PySlice_Check(idx)) {
 	Py_ssize_t start, stop, step, slicelen;
 
-	if (PySlice_GetIndicesEx((PySliceObject *)idx,
+	if (PySlice_GetIndicesEx((PyObject *)idx,
 		((RangeObject *)(self))->end-((RangeObject *)(self))->start+1,
 		&start, &stop,
 		&step, &slicelen) < 0) {
@@ -1164,7 +1164,7 @@
     } else if (PySlice_Check(idx)) {
 	Py_ssize_t start, stop, step, slicelen;
 
-	if (PySlice_GetIndicesEx((PySliceObject *)idx,
+	if (PySlice_GetIndicesEx((PyObject *)idx,
 		((RangeObject *)(self))->end-((RangeObject *)(self))->start+1,
 		&start, &stop,
 		&step, &slicelen) < 0) {
diff --git a/src/version.c b/src/version.c
index b2a1a85..ab54766 100644
--- a/src/version.c
+++ b/src/version.c
@@ -710,6 +710,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    309,
+/**/
     308,
 /**/
     307,