diff --git a/init/init.c b/init/init.c
index b8b4f4037..a748ec36b 100644
--- a/init/init.c
+++ b/init/init.c
@@ -421,7 +421,7 @@ static void msg_stop(const char *name)
     if (svc) {
         service_stop(svc);
     } else {
-        ERROR("no such service '%s'\n");
+        ERROR("no such service '%s'\n", name);
     }
 }
 
diff --git a/init/init.h b/init/init.h
index b68686930..c9363daf4 100644
--- a/init/init.h
+++ b/init/init.h
@@ -29,7 +29,8 @@ void *read_file(const char *fn, unsigned *_sz);
 void log_init(void);
 void log_set_level(int level);
 void log_close(void);
-void log_write(int level, const char *fmt, ...);
+void log_write(int level, const char *fmt, ...)
+    __attribute__ ((format(printf, 2, 3)));
 
 #define ERROR(x...)   log_write(3, "<3>init: " x)
 #define NOTICE(x...)  log_write(5, "<5>init: " x)