diff --git a/Modules/bz2module.c b/Modules/bz2module.c
index af67ff1..db93675 100644
--- a/Modules/bz2module.c
+++ b/Modules/bz2module.c
@@ -1285,8 +1285,8 @@
 static int
 BZ2File_init(BZ2FileObject *self, PyObject *args, PyObject *kwargs)
 {
-	static char *kwlist[] = {"filename", "mode", "buffering",
-				 "compresslevel", 0};
+	static const char *kwlist[] = {"filename", "mode", "buffering",
+                                       "compresslevel", 0};
 	PyObject *name;
 	char *mode = "r";
 	int buffering = -1;
@@ -1674,7 +1674,7 @@
 {
 	int compresslevel = 9;
 	int bzerror;
-	static char *kwlist[] = {"compresslevel", 0};
+	static const char *kwlist[] = {"compresslevel", 0};
 
 	if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|i:BZ2Compressor",
 					 kwlist, &compresslevel))
@@ -2019,7 +2019,7 @@
 	bz_stream _bzs;
 	bz_stream *bzs = &_bzs;
 	int bzerror;
-	static char *kwlist[] = {"data", "compresslevel", 0};
+	static const char *kwlist[] = {"data", "compresslevel", 0};
 
 	if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s#|i",
 					 kwlist, &data, &datasize,