diff --git a/aegisub/src/text_file_writer.h b/aegisub/src/text_file_writer.h
index 542038a64..b0b8cfa76 100644
--- a/aegisub/src/text_file_writer.h
+++ b/aegisub/src/text_file_writer.h
@@ -78,5 +78,5 @@ public:
 #elif defined(_WIN32)
 #define wxSTRING_ENCODING "utf-16le"
 #else
-#error wx must be built with wxUSE_UNICODE_UTF8
+#define wxSTRING_ENCODING "utf-32le"
 #endif