=== modified file 'src/liblzma_options.c'
--- src/liblzma_options.c	2010-08-30 15:21:10 +0000
+++ src/liblzma_options.c	2016-11-19 05:20:10 +0000
@@ -56,7 +56,7 @@
  */
 bool
 init_lzma_options(const char *funcName, PyObject *kwargs, lzma_filter *filters){
-	const char *argtypes = "|iiiiiiOOsO:";
+	const char *argtypes = "|iiiiiiOOss:";
 	PyObject *args = NULL, *levelString = NULL, *extremeString = NULL,
 		 *mf_key = NULL, *mode_key = NULL;
 	char *myFormat = NULL, *myCheck = NULL;