diff --git a/extra/html/elements/elements.factor b/extra/html/elements/elements.factor
index ff3e7b1283..101bc423b5 100644
--- a/extra/html/elements/elements.factor
+++ b/extra/html/elements/elements.factor
@@ -4,7 +4,7 @@
 ! See http://factorcode.org/license.txt for BSD license.
 
 USING: io kernel namespaces prettyprint quotations
-sequences strings words xml.writer compiler.units effects ;
+sequences strings words xml.entities compiler.units effects ;
 
 IN: html.elements
 
diff --git a/extra/html/html.factor b/extra/html/html.factor
index b5d4e63930..0860ae6c48 100755
--- a/extra/html/html.factor
+++ b/extra/html/html.factor
@@ -3,7 +3,7 @@
 USING: generic assocs help http io io.styles io.files
 io.streams.string kernel math math.parser namespaces
 quotations assocs sequences strings words html.elements
-xml.writer sbufs ;
+xml.entities sbufs continuations ;
 IN: html
 
 GENERIC: browser-link-href ( presented -- href )
diff --git a/extra/io/streams/null/null.factor b/extra/io/streams/null/null.factor
index 28d1b29be8..f76b0cbce3 100755
--- a/extra/io/streams/null/null.factor
+++ b/extra/io/streams/null/null.factor
@@ -1,7 +1,7 @@
 ! Copyright (C) 2007 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
 IN: io.streams.null
-USING: kernel io ;
+USING: kernel io continuations ;
 
 TUPLE: null-stream ;
 
diff --git a/extra/tar/tar.factor b/extra/tar/tar.factor
index ee312c1111..3bce7df9d6 100755
--- a/extra/tar/tar.factor
+++ b/extra/tar/tar.factor
@@ -1,5 +1,5 @@
 USING: combinators io io.files io.streams.duplex
-io.streams.string kernel math math.parser
+io.streams.string kernel math math.parser continuations
 namespaces pack prettyprint sequences strings system ;
 USING: hexdump tools.interpreter ;
 IN: tar