diff --git a/src/emu/nanos6/breakdown.c b/src/emu/nanos6/breakdown.c
index 1fd6102..f11093d 100644
--- a/src/emu/nanos6/breakdown.c
+++ b/src/emu/nanos6/breakdown.c
@@ -217,7 +217,7 @@ model_nanos6_breakdown_connect(struct emu *emu)
 
 int
 model_nanos6_breakdown_finish(struct emu *emu,
-		const struct pcf_value_label (**labels)[])
+		const struct pcf_value_label **labels)
 {
 	if (emu->args.breakdown == 0)
 		return 0;
@@ -231,12 +231,20 @@ model_nanos6_breakdown_finish(struct emu *emu,
 	const struct pcf_value_label *v = NULL;
 
 	/* Emit subsystem values */
-	for (v = *labels[CH_SUBSYSTEM]; v->label; v++)
-		pcf_add_value(pcftype, v->value, v->label);
+	for (v = labels[CH_SUBSYSTEM]; v->label; v++) {
+		if (pcf_add_value(pcftype, v->value, v->label) != 0) {
+			err("pcf_add_value failed");
+			return -1;
+		}
+	}
 
 	/* Emit idle values */
-	for (v = *labels[CH_IDLE]; v->label; v++)
-		pcf_add_value(pcftype, v->value, v->label);
+	for (v = labels[CH_IDLE]; v->label; v++) {
+		if (pcf_add_value(pcftype, v->value, v->label) != 0) {
+			err("pcf_add_value failed");
+			return -1;
+		}
+	}
 
 	/* Emit task_type values */
 	struct system *sys = &emu->system;
diff --git a/src/emu/nanos6/nanos6_priv.h b/src/emu/nanos6/nanos6_priv.h
index 1b12a47..8fce2df 100644
--- a/src/emu/nanos6/nanos6_priv.h
+++ b/src/emu/nanos6/nanos6_priv.h
@@ -98,6 +98,6 @@ int model_nanos6_finish(struct emu *emu);
 int model_nanos6_breakdown_create(struct emu *emu);
 int model_nanos6_breakdown_connect(struct emu *emu);
 int model_nanos6_breakdown_finish(struct emu *emu,
-		const struct pcf_value_label (**labels)[]);
+		const struct pcf_value_label **labels);
 
 #endif /* NANOS6_PRIV_H */
diff --git a/src/emu/nanos6/setup.c b/src/emu/nanos6/setup.c
index 7f9b8f0..e58dcd0 100644
--- a/src/emu/nanos6/setup.c
+++ b/src/emu/nanos6/setup.c
@@ -131,10 +131,10 @@ static const struct pcf_value_label nanos6_worker_idle[] = {
 	{ -1, NULL },
 };
 
-static const struct pcf_value_label (*pcf_labels[CH_MAX])[] = {
-	[CH_SUBSYSTEM] = &nanos6_ss_values,
-	[CH_THREAD]    = &nanos6_thread_type,
-	[CH_IDLE]      = &nanos6_worker_idle,
+static const struct pcf_value_label *pcf_labels[CH_MAX] = {
+	[CH_SUBSYSTEM] = nanos6_ss_values,
+	[CH_THREAD]    = nanos6_thread_type,
+	[CH_IDLE]      = nanos6_worker_idle,
 };
 
 static const long prv_flags[CH_MAX] = {