diff --git a/src/catch2/catch_message.cpp b/src/catch2/catch_message.cpp
index c140c08e..2a35da1d 100644
--- a/src/catch2/catch_message.cpp
+++ b/src/catch2/catch_message.cpp
@@ -17,13 +17,6 @@ namespace Catch {
 
     ////////////////////////////////////////////////////////////////////////////
 
-    Catch::MessageBuilder::MessageBuilder( StringRef const& macroName,
-                                           SourceLineInfo const& lineInfo,
-                                           ResultWas::OfType type )
-        :m_info(macroName, lineInfo, type) {}
-
-    ////////////////////////////////////////////////////////////////////////////
-
 
     ScopedMessage::ScopedMessage( MessageBuilder const& builder ):
         m_info( builder.m_info ) {
diff --git a/src/catch2/catch_message.hpp b/src/catch2/catch_message.hpp
index db60b6bf..970ba438 100644
--- a/src/catch2/catch_message.hpp
+++ b/src/catch2/catch_message.hpp
@@ -34,9 +34,11 @@ namespace Catch {
     };
 
     struct MessageBuilder : MessageStream {
-        MessageBuilder( StringRef const& macroName,
+        MessageBuilder( StringRef macroName,
                         SourceLineInfo const& lineInfo,
-                        ResultWas::OfType type );
+                        ResultWas::OfType type ):
+            m_info(macroName, lineInfo, type) {}
+
 
         template<typename T>
         MessageBuilder& operator << ( T const& value ) {