diff --git a/conf/conf.c b/conf/conf.c
index 50e5944b..3fd10ad8 100644
--- a/conf/conf.c
+++ b/conf/conf.c
@@ -504,7 +504,7 @@ order_shutdown(void)
  * error in the configuration.
  */
 void
-cf_error(char *msg, ...)
+cf_error(const char *msg, ...)
 {
   char buf[1024];
   va_list args;
diff --git a/conf/conf.h b/conf/conf.h
index 1c4f7fce..8e490c7b 100644
--- a/conf/conf.h
+++ b/conf/conf.h
@@ -68,7 +68,7 @@ int config_commit(struct config *, int type, int timeout);
 int config_confirm(void);
 int config_undo(void);
 void config_init(void);
-void cf_error(char *msg, ...) NORET;
+void cf_error(const char *msg, ...) NORET;
 void config_add_obstacle(struct config *);
 void config_del_obstacle(struct config *);
 void order_shutdown(void);
diff --git a/nest/proto.c b/nest/proto.c
index 5b55f9ee..f712fe5f 100644
--- a/nest/proto.c
+++ b/nest/proto.c
@@ -39,6 +39,12 @@ static int graceful_restart_state;
 static u32 graceful_restart_locks;
 
 static char *p_states[] = { "DOWN", "START", "UP", "STOP" };
+static char *cs_states[] = {
+    [CS_DOWN] = "DOWN",
+    [CS_START] = "START",
+    [CS_UP] = "UP",
+    [CS_FLUSHING] = "FLUSHING"
+};
 
 extern struct protocol proto_unix_iface;
 
@@ -313,7 +319,7 @@ channel_set_state(struct channel *c, uint state)
   uint cs = c->channel_state;
   uint es = c->export_state;
 
-  DBG("%s reporting state transition %s/%s -> */%s\n", p->name, c_states[cs], p_states[ops], p_states[ps]);
+  DBG("%s reporting channel %s state transition %s -> %s\n", c->proto->name, c->name, cs_states[cs], cs_states[state]);
   if (state == cs)
     return;
 
diff --git a/nest/rt-dev.c b/nest/rt-dev.c
index 17737853..a996f4fc 100644
--- a/nest/rt-dev.c
+++ b/nest/rt-dev.c
@@ -34,7 +34,7 @@ dev_ifa_notify(struct proto *P, uint flags, struct ifa *ad)
 
   if (!EMPTY_LIST(cf->iface_list) &&
       !iface_patt_find(&cf->iface_list, ad->iface, ad->iface->addr))
-    /* Empty list is automagically treated as "*" */
+    /* Empty list is automatically treated as "*" */
     return;
 
   if (ad->flags & IA_SECONDARY)