diff --git a/espeakup.c b/espeakup.c
index 7a6bba4..e8da682 100644
--- a/espeakup.c
+++ b/espeakup.c
@@ -114,7 +114,6 @@ int main(int argc, char **argv)
 
 	/* initialize espeak */
 	espeak_Initialize(AUDIO_OUTPUT_PLAYBACK, 0, NULL, 0);
-	espeak_SetSynthCallback(SynthCallback);
 
 	/* Setup initial voice parameters */
 	set_frequency(&s, defaultFrequency, ADJ_SET);
diff --git a/espeakup.h b/espeakup.h
index 16556f5..7231927 100644
--- a/espeakup.h
+++ b/espeakup.h
@@ -60,8 +60,6 @@ extern void queue_add_cmd(enum command_t cmd, enum adjust_t adj,
 						  int value);
 extern void queue_add_text(char *txt, size_t length);
 extern void queue_process_entry(struct synth_t *s);
-extern int SynthCallback(short *wav, int numsamples,
-						 espeak_EVENT * events);
 extern espeak_ERROR set_frequency(struct synth_t *s, int freq,
 								  enum adjust_t adj);
 extern espeak_ERROR set_pitch(struct synth_t *s, int pitch,
diff --git a/synth.c b/synth.c
index 7c5c82e..375a7c0 100644
--- a/synth.c
+++ b/synth.c
@@ -28,11 +28,6 @@ const int rateMultiplier = 34;
 const int rateOffset = 84;
 const int volumeMultiplier = 22;
 
-int SynthCallback(short *wav, int numsamples, espeak_EVENT * events)
-{
-	return 0;
-}
-
 espeak_ERROR set_frequency(struct synth_t * s, int freq, enum adjust_t adj)
 {
 	espeak_ERROR rc;