diff --git a/sndiod/dev.c b/sndiod/dev.c
index 823db06..18b2758 100644
--- a/sndiod/dev.c
+++ b/sndiod/dev.c
@@ -27,7 +27,7 @@
 #include "sysex.h"
 #include "utils.h"
 
-void zomb_onmove(void *, int);
+void zomb_onmove(void *);
 void zomb_onvol(void *, unsigned int);
 void zomb_fill(void *);
 void zomb_flush(void *);
@@ -159,7 +159,7 @@ slot_log(struct slot *s)
 }
 
 void
-zomb_onmove(void *arg, int delta)
+zomb_onmove(void *arg)
 {
 }
 
@@ -913,7 +913,7 @@ dev_onmove(struct dev *d, int delta)
 		s->delta_rem = pos % d->round;
 		s->delta += pos / (int)d->round;
 		if (s->delta >= 0)
-			s->ops->onmove(s->arg, delta);
+			s->ops->onmove(s->arg);
 	}
 	if (d->tstate == MMC_RUN)
 		dev_midi_qfr(d, delta);
diff --git a/sndiod/dev.h b/sndiod/dev.h
index 94bd748..a91db35 100644
--- a/sndiod/dev.h
+++ b/sndiod/dev.h
@@ -27,7 +27,7 @@
 
 struct slotops
 {
-	void (*onmove)(void *, int);		/* clock tick */
+	void (*onmove)(void *);			/* clock tick */
 	void (*onvol)(void *, unsigned int);	/* tell client vol changed */
 	void (*fill)(void *);			/* request to fill a play block */
 	void (*flush)(void *);			/* request to flush a rec block */
diff --git a/sndiod/sock.c b/sndiod/sock.c
index 277809d..c2d1eee 100644
--- a/sndiod/sock.c
+++ b/sndiod/sock.c
@@ -37,7 +37,7 @@ void sock_close(struct sock *);
 void sock_slot_fill(void *);
 void sock_slot_flush(void *);
 void sock_slot_eof(void *);
-void sock_slot_onmove(void *, int);
+void sock_slot_onmove(void *);
 void sock_slot_onvol(void *, unsigned int);
 void sock_midi_imsg(void *, unsigned char *, int);
 void sock_midi_omsg(void *, unsigned char *, int);
@@ -206,7 +206,7 @@ sock_slot_eof(void *arg)
 }
 
 void
-sock_slot_onmove(void *arg, int delta)
+sock_slot_onmove(void *arg)
 {
 	struct sock *f = (struct sock *)arg;
 	struct slot *s = f->slot;