diff --git a/aegisub/src/auto4_lua.cpp b/aegisub/src/auto4_lua.cpp
index 9a0fe3892..a27d6ddf9 100644
--- a/aegisub/src/auto4_lua.cpp
+++ b/aegisub/src/auto4_lua.cpp
@@ -73,8 +73,7 @@
 #include "../../contrib/lua51/src/lualib.h"
 #include "../../contrib/lua51/src/lauxlib.h"
 #else
-#include <lualib.h>
-#include <lauxlib.h>
+#include <lua.hpp>
 #endif
 
 namespace {
diff --git a/aegisub/src/auto4_lua_assfile.cpp b/aegisub/src/auto4_lua_assfile.cpp
index 97528a35e..ea4270baf 100644
--- a/aegisub/src/auto4_lua_assfile.cpp
+++ b/aegisub/src/auto4_lua_assfile.cpp
@@ -63,8 +63,7 @@
 #include "../../contrib/lua51/src/lualib.h"
 #include "../../contrib/lua51/src/lauxlib.h"
 #else
-#include <lualib.h>
-#include <lauxlib.h>
+#include <lua.hpp>
 #endif
 
 namespace {
diff --git a/aegisub/src/auto4_lua_dialog.cpp b/aegisub/src/auto4_lua_dialog.cpp
index e30e04d41..a34ef3e20 100644
--- a/aegisub/src/auto4_lua_dialog.cpp
+++ b/aegisub/src/auto4_lua_dialog.cpp
@@ -68,8 +68,7 @@
 #include "../../contrib/lua51/src/lualib.h"
 #include "../../contrib/lua51/src/lauxlib.h"
 #else
-#include <lualib.h>
-#include <lauxlib.h>
+#include <lua.hpp>
 #endif
 
 namespace {
diff --git a/aegisub/src/auto4_lua_progresssink.cpp b/aegisub/src/auto4_lua_progresssink.cpp
index a587f372f..d8aee827e 100644
--- a/aegisub/src/auto4_lua_progresssink.cpp
+++ b/aegisub/src/auto4_lua_progresssink.cpp
@@ -34,6 +34,8 @@
 /// @ingroup scripting
 ///
 
+#include "config.h"
+
 #ifdef WITH_AUTO4_LUA
 
 #include "auto4_lua.h"