diff --git a/aegisub/libaegisub/common/charset_conv.cpp b/aegisub/libaegisub/common/charset_conv.cpp
index d6bbd0731..61c054738 100644
--- a/aegisub/libaegisub/common/charset_conv.cpp
+++ b/aegisub/libaegisub/common/charset_conv.cpp
@@ -21,6 +21,8 @@
 #ifndef LAGI_PRE
 #endif
 
+#include "../config.h"
+
 #include <libaegisub/charset_conv.h>
 #include <iconv.h>