1 files changed, 3 insertions, 2 deletions
diff --git a/cpp/src/tests/MessageBuilderTest.cpp b/cpp/src/tests/MessageBuilderTest.cpp
index 55f568d41d..63c3a800de 100644
--- a/cpp/src/tests/MessageBuilderTest.cpp
+++ b/cpp/src/tests/MessageBuilderTest.cpp
@@ -63,14 +63,15 @@ class MockMessageStore : public NullMessageStore
         ops.push_back(APPEND); 
     }
 
-    void stage(intrusive_ptr<PersistableMessage>& msg)
+    void stage(const intrusive_ptr<PersistableMessage>& msg)
     {
         checkExpectation(STAGE);
         BOOST_CHECK_EQUAL(expectedMsg, msg);
         msg->setPersistenceId(++id);
     }
 
-    void appendContent(intrusive_ptr<const PersistableMessage>& msg, const string& data)
+    void appendContent(const intrusive_ptr<const PersistableMessage>& msg,
+                       const string& data)
     {
         checkExpectation(APPEND);
         BOOST_CHECK_EQUAL(static_pointer_cast<const PersistableMessage>(expectedMsg), msg);