diff --git a/aucat/aparams.c b/aucat/aparams.c
index 401d93d..5ee05f0 100644
--- a/aucat/aparams.c
+++ b/aucat/aparams.c
@@ -45,6 +45,7 @@ int aparams_ctltovol[128] = {
  */
 struct aparams aparams_none = { 1, 0, 0, 0, 0, 0, 0, 0 };
 
+#ifdef DEBUG
 /*
  * Generate a string corresponding to the encoding in par,
  * return the length of the resulting string.
@@ -74,6 +75,7 @@ aparams_enctostr(struct aparams *par, char *ostr)
 	*p++ = '\0';
 	return p - ostr - 1;
 }
+#endif /* DEBUG */
 
 /*
  * Parse an encoding string, examples: s8, u8, s16, s16le, s24be ...
@@ -221,29 +223,6 @@ aparams_eqenc(struct aparams *par1, struct aparams *par2)
 	return 1;
 }
 
-/*
- * Return true if both parameters are the same.
- */
-int
-aparams_eq(struct aparams *par1, struct aparams *par2)
-{
-	if (!aparams_eqenc(par1, par2) ||
-	    par1->cmin != par2->cmin ||
-	    par1->cmax != par2->cmax ||
-	    par1->rate != par2->rate)
-		return 0;
-	return 1;
-}
-
-/*
- * Return true if first channel range includes second range.
- */
-int
-aparams_subset(struct aparams *subset, struct aparams *set)
-{
-	return subset->cmin >= set->cmin && subset->cmax <= set->cmax;
-}
-
 /*
  * Grow channels range and sample rate of ``set'' in order ``subset'' to
  * become an actual subset of it.
diff --git a/aucat/aproc.c b/aucat/aproc.c
index 0640925..00db513 100644
--- a/aucat/aproc.c
+++ b/aucat/aproc.c
@@ -158,7 +158,7 @@ aproc_new(struct aproc_ops *ops, char *name)
 
 	p = malloc(sizeof(struct aproc));
 	if (p == NULL)
-		err(1, name);
+		err(1, "%s", name);
 	LIST_INIT(&p->ins);
 	LIST_INIT(&p->outs);
 	p->name = name;