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-rw-r--r--src/prf_x942.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/prf_x942.cpp b/src/prf_x942.cpp
index 8ede79efa..18deca46d 100644
--- a/src/prf_x942.cpp
+++ b/src/prf_x942.cpp
@@ -67,7 +67,7 @@ SecureVector<byte> X942_PRF::derive(u32bit key_len,
);
SecureVector<byte> digest = hash->final();
- key.append(digest, std::min(digest.size(), key_len - key.size()));
+ key.push_back(digest, std::min(digest.size(), key_len - key.size()));
++counter;
}