diff --git a/espeakup.h b/espeakup.h
index 90efc9a..2d6210a 100644
--- a/espeakup.h
+++ b/espeakup.h
@@ -51,6 +51,10 @@ struct synth_t {
 
 extern int debug;
 
+extern void queue_clear(void);
+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, enum adjust_t adj);