diff --git a/include/lol/private/base/msg.h b/include/lol/private/base/msg.h
index 41e3f612..4bbbb7dc 100644
--- a/include/lol/private/base/msg.h
+++ b/include/lol/private/base/msg.h
@@ -16,7 +16,8 @@
 #include "../base/env.h" // sys::getenv
 #endif
 
-#include <cstdio> // std::vfprintf
+#include <cstdarg> // va_start
+#include <cstdio>  // std::vfprintf
 
 namespace lol
 {
diff --git a/legacy/lol/base/assert.h b/legacy/lol/base/assert.h
index 663646fd..7c22e520 100644
--- a/legacy/lol/base/assert.h
+++ b/legacy/lol/base/assert.h
@@ -1,7 +1,7 @@
 //
 //  Lol Engine
 //
-//  Copyright © 2010—2015 Sam Hocevar <sam@hocevar.net>
+//  Copyright © 2010—2020 Sam Hocevar <sam@hocevar.net>
 //
 //  Lol Engine is free software. It comes without any warranty, to
 //  the extent permitted by applicable law. You can redistribute it
@@ -12,7 +12,7 @@
 
 #pragma once
 
-#include <lol/base/log.h>
+#include <lol/msg>
 
 #include <cstdlib>