diff --git a/crypto/evp/evp_asn1.c b/crypto/evp/evp_asn1.c
index 08956e1..c57f411 100644
--- a/crypto/evp/evp_asn1.c
+++ b/crypto/evp/evp_asn1.c
@@ -87,6 +87,8 @@
   if (!ret->ameth->old_priv_decode ||
       !ret->ameth->old_priv_decode(ret, &in, len)) {
     if (ret->ameth->priv_decode) {
+      /* Reset |in| in case |old_priv_decode| advanced it on error. */
+      in = *inp;
       PKCS8_PRIV_KEY_INFO *p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL, &in, len);
       if (!p8) {
         goto err;