diff --git a/espeakup.h b/espeakup.h
index 600c23a..bc0c209 100644
--- a/espeakup.h
+++ b/espeakup.h
@@ -60,10 +60,10 @@ 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, enum adjust_t adj);
-extern espeak_ERROR set_rate (struct synth_t *s, int rate, enum adjust_t adj);
+extern espeak_ERROR set_pitch(struct synth_t *s, int pitch, enum adjust_t adj);
+extern espeak_ERROR set_rate(struct synth_t *s, int rate, enum adjust_t adj);
 extern espeak_ERROR set_voice(struct synth_t *s);
-extern espeak_ERROR set_volume (struct synth_t *s, int vol, enum adjust_t adj);
+extern espeak_ERROR set_volume(struct synth_t *s, int vol, enum adjust_t adj);
 extern espeak_ERROR stop_speech(void);
 extern espeak_ERROR speak_text(struct synth_t *s);
 extern void open_softsynth(void);