diff --git a/basis/io/streams/null/null.factor b/basis/io/streams/null/null.factor
index 2b62ec938a..d47ff9b9f7 100644
--- a/basis/io/streams/null/null.factor
+++ b/basis/io/streams/null/null.factor
@@ -14,6 +14,9 @@ M: null-reader stream-readln drop f ;
 M: null-reader stream-read1 drop f ;
 M: null-reader stream-read-until 2drop f f ;
 M: null-reader stream-read 2drop f ;
+M: null-reader stream-read-partial 2drop f ;
+M: null-reader stream-read-unsafe 3drop 0 ;
+M: null-reader stream-read-partial-unsafe 3drop 0 ;
 
 M: null-writer stream-element-type drop +byte+ ;
 M: null-writer stream-write1 2drop ;