diff --git a/crypto/lz4.c b/crypto/lz4.c
index 4586dd1..91a0613 100644
--- a/crypto/lz4.c
+++ b/crypto/lz4.c
@@ -66,9 +66,8 @@ static int lz4_decompress_crypto(struct crypto_tfm *tfm, const u8 *src,
 {
 	int err;
 	size_t tmp_len = *dlen;
-	size_t __slen = slen;
 
-	err = lz4_decompress(src, &__slen, dst, tmp_len);
+	err = lz4_decompress_unknownoutputsize(src, slen, dst, &tmp_len);
 	if (err < 0)
 		return -EINVAL;
 
diff --git a/crypto/lz4hc.c b/crypto/lz4hc.c
index 151ba31..9987741 100644
--- a/crypto/lz4hc.c
+++ b/crypto/lz4hc.c
@@ -66,9 +66,8 @@ static int lz4hc_decompress_crypto(struct crypto_tfm *tfm, const u8 *src,
 {
 	int err;
 	size_t tmp_len = *dlen;
-	size_t __slen = slen;
 
-	err = lz4_decompress(src, &__slen, dst, tmp_len);
+	err = lz4_decompress_unknownoutputsize(src, slen, dst, &tmp_len);
 	if (err < 0)
 		return -EINVAL;