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-rw-r--r--extmod/moduzlib.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/extmod/moduzlib.c b/extmod/moduzlib.c
index 821f300dab..30e5a05e43 100644
--- a/extmod/moduzlib.c
+++ b/extmod/moduzlib.c
@@ -68,7 +68,12 @@ STATIC mp_obj_t mod_uzlib_decompress(mp_uint_t n_args, const mp_obj_t *args) {
decomp->destGrow = mod_uzlib_grow_buf;
decomp->source = bufinfo.buf;
- int st = tinf_zlib_uncompress_dyn(decomp, bufinfo.len);
+ int st;
+ if (n_args > 1 && MP_OBJ_SMALL_INT_VALUE(args[1]) < 0) {
+ st = tinf_uncompress_dyn(decomp);
+ } else {
+ st = tinf_zlib_uncompress_dyn(decomp, bufinfo.len);
+ }
if (st != 0) {
nlr_raise(mp_obj_new_exception_arg1(&mp_type_ValueError, MP_OBJ_NEW_SMALL_INT(st)));
}