diff --git a/include/qpdf/Buffer.hh b/include/qpdf/Buffer.hh
index 979d57d..cce0f95 100644
--- a/include/qpdf/Buffer.hh
+++ b/include/qpdf/Buffer.hh
@@ -69,8 +69,6 @@ class Buffer
   private:
     class Members;
 
-    void copy(Buffer const&);
-
     std::unique_ptr<Members> m;
 };
 
diff --git a/libqpdf/Buffer.cc b/libqpdf/Buffer.cc
index 532ebd0..1975d40 100644
--- a/libqpdf/Buffer.cc
+++ b/libqpdf/Buffer.cc
@@ -88,17 +88,6 @@ Buffer::operator=(Buffer&& rhs) noexcept
 
 Buffer::~Buffer() = default;
 
-void
-Buffer::copy(Buffer const& rhs)
-{
-    if (this != &rhs) {
-        m = std::make_unique<Members>(rhs.m->size, nullptr, true);
-        if (m->size) {
-            memcpy(m->buf, rhs.m->buf, m->size);
-        }
-    }
-}
-
 size_t
 Buffer::getSize() const
 {