diff --git a/src/core/midi/MidiApple.cpp b/src/core/midi/MidiApple.cpp
index f4bc0d4dd..3d34de2fe 100644
--- a/src/core/midi/MidiApple.cpp
+++ b/src/core/midi/MidiApple.cpp
@@ -398,7 +398,7 @@ void MidiApple::midiInClose( MIDIEndpointRef reference )
 
 
 
-char *getName( MIDIObjectRef &object )
+char *getName( const MIDIObjectRef &object )
 {
 	// Returns the name of a given MIDIObjectRef as char *
 	CFStringRef name = nil;