diff --git a/apps/plugins/midi/sequencer.c b/apps/plugins/midi/sequencer.c
index f0af3fecd0..b9cc83f9ad 100644
--- a/apps/plugins/midi/sequencer.c
+++ b/apps/plugins/midi/sequencer.c
@@ -366,7 +366,7 @@ static void sendEvent(struct Event * ev)
     }
 }
 
-void rewindFile()
+void rewindFile(void)
 {
     int i=0;
     for(i=0; i<mf->numTracks; i++)
diff --git a/apps/plugins/midi/sequencer.h b/apps/plugins/midi/sequencer.h
index 0a70b98a1b..8cb190442c 100644
--- a/apps/plugins/midi/sequencer.h
+++ b/apps/plugins/midi/sequencer.h
@@ -21,7 +21,7 @@ int tick(void);
 
 /* used by beatbox */
 void pressNote(int ch, int note, int vol);
-void rewindFile();
+void rewindFile(void);
 
 extern long tempo;
 
diff --git a/apps/plugins/midi/synth.h b/apps/plugins/midi/synth.h
index aaaf2bbd74..c8d8eaf876 100644
--- a/apps/plugins/midi/synth.h
+++ b/apps/plugins/midi/synth.h
@@ -20,7 +20,7 @@ int initSynth(struct MIDIfile * mf, char * filename, char * drumConfig);
 void setPoint(struct SynthObject * so, int pt);
 void synthSamples(int32_t *buf_ptr, unsigned int num_samples);
 
-void resetControllers();
+void resetControllers(void);
 
 static inline struct Event * getEvent(struct Track * tr, int evNum)
 {