diff --git a/src/util/buffer.h b/src/util/buffer.h
index 6229b3040..8b8c34452 100644
--- a/src/util/buffer.h
+++ b/src/util/buffer.h
@@ -32,7 +32,7 @@ protected:
     void expand() {
         unsigned new_capacity = m_capacity << 1;
         char * new_buffer        = new char[sizeof(T) * new_capacity];
-        std::memcpy(new_buffer, m_buffer, m_pos * sizeof(T));
+        std::memcpy(new_buffer, static_cast<void*>(m_buffer), m_pos * sizeof(T));
         free_memory();
         m_buffer              = reinterpret_cast<T*>(new_buffer);
         m_capacity            = new_capacity;