diff --git a/crypto/cipher_extra/derive_key.c b/crypto/cipher_extra/derive_key.c
index ff5ae06..45b4963 100644
--- a/crypto/cipher_extra/derive_key.c
+++ b/crypto/cipher_extra/derive_key.c
@@ -86,7 +86,7 @@
   EVP_MD_CTX_init(&c);
   for (;;) {
     if (!EVP_DigestInit_ex(&c, md, NULL)) {
-      return 0;
+      goto err;
     }
     if (addmd++) {
       if (!EVP_DigestUpdate(&c, md_buf, mds)) {