diff --git a/basis/io/encodings/utf32/utf32.factor b/basis/io/encodings/utf32/utf32.factor
index e609738ff6..025b74103e 100644
--- a/basis/io/encodings/utf32/utf32.factor
+++ b/basis/io/encodings/utf32/utf32.factor
@@ -60,3 +60,5 @@ M: utf32 <decoder> ( stream utf32 -- decoder )
 
 M: utf32 <encoder> ( stream utf32 -- encoder )
     drop bom-le over stream-write utf32le <encoder> ;
+
+PRIVATE>