--- hatari/src/includes/midi.h	2019/04/01 07:15:27	1.1.1.4
+++ hatari/src/includes/midi.h	2019/04/09 08:53:09	1.1.1.6
@@ -1,20 +1,20 @@
 /*
   Hatari - midi.h
 
-  This file is distributed under the GNU Public License, version 2 or at
-  your option any later version. Read the file gpl.txt for details.
+  This file is distributed under the GNU General Public License, version 2
+  or at your option any later version. Read the file gpl.txt for details.
 */
 
 #ifndef HATARI_MIDI_H
 #define HATARI_MIDI_H
 
-void Midi_Init(void);
-void Midi_UnInit(void);
-void Midi_Reset(void);
-void Midi_Control_ReadByte(void);
-void Midi_Data_ReadByte(void);
-void Midi_Control_WriteByte(void);
-void Midi_Data_WriteByte(void);
-void Midi_InterruptHandler_Update(void);
+extern void Midi_Init(void);
+extern void Midi_UnInit(void);
+extern void Midi_Reset(void);
+extern void Midi_Control_ReadByte(void);
+extern void Midi_Data_ReadByte(void);
+extern void Midi_Control_WriteByte(void);
+extern void Midi_Data_WriteByte(void);
+extern void Midi_InterruptHandler_Update(void);
 
 #endif