diff --git a/fs/ubifs/ubifs.c b/fs/ubifs/ubifs.c
index 47fa41ad1d..d5101d3c45 100644
--- a/fs/ubifs/ubifs.c
+++ b/fs/ubifs/ubifs.c
@@ -125,6 +125,7 @@ crypto_comp_decompress(const struct ubifs_info *c, struct crypto_comp *tfm,
 {
 	struct ubifs_compressor *compr = ubifs_compressors[tfm->compressor];
 	int err;
+	size_t tmp_len = *dlen;
 
 	if (compr->compr_type == UBIFS_COMPR_NONE) {
 		memcpy(dst, src, slen);
@@ -132,11 +133,12 @@ crypto_comp_decompress(const struct ubifs_info *c, struct crypto_comp *tfm,
 		return 0;
 	}
 
-	err = compr->decompress(src, slen, dst, (size_t *)dlen);
+	err = compr->decompress(src, slen, dst, &tmp_len);
 	if (err)
 		ubifs_err(c, "cannot decompress %d bytes, compressor %s, "
 			  "error %d", slen, compr->name, err);
 
+	*dlen = tmp_len;
 	return err;
 
 	return 0;