1 files changed, 8 insertions, 0 deletions
diff --git a/src/lib/hash/comb4p/comb4p.cpp b/src/lib/hash/comb4p/comb4p.cpp
index ece8c9051..f6c20f35e 100644
--- a/src/lib/hash/comb4p/comb4p.cpp
+++ b/src/lib/hash/comb4p/comb4p.cpp
@@ -69,6 +69,14 @@ void Comb4P::clear()
    m_hash2->update(0);
    }
 
+std::unique_ptr<HashFunction> Comb4P::copy_state() const
+   {
+   std::unique_ptr<Comb4P> copy(new Comb4P);
+   copy->m_hash1 = m_hash1->copy_state();
+   copy->m_hash2 = m_hash2->copy_state();
+   return std::move(copy);
+   }
+
 void Comb4P::add_data(const uint8_t input[], size_t length)
    {
    m_hash1->update(input, length);