diff --git a/basis/environment/environment-docs.factor b/basis/environment/environment-docs.factor
index fee30fa8a6..4dda4977b4 100644
--- a/basis/environment/environment-docs.factor
+++ b/basis/environment/environment-docs.factor
@@ -1,6 +1,7 @@
 ! Copyright (C) 2008 Doug Coleman.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: assocs help.markup help.syntax io.streams.string sequences strings ;
+USING: assocs environment.unix help.markup help.syntax
+io.streams.string libc sequences strings ;
 IN: environment
 
 HELP: (os-envs)
diff --git a/basis/environment/environment.factor b/basis/environment/environment.factor
index 92859349b7..333f14b960 100644
--- a/basis/environment/environment.factor
+++ b/basis/environment/environment.factor
@@ -1,7 +1,8 @@
 ! Copyright (C) 2008 Doug Coleman.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: assocs combinators init kernel sequences splitting
-system vocabs vocabs.loader ;
+USING: assocs combinators environment.unix help.markup
+help.syntax init io.streams.string kernel libc sequences
+splitting strings system vocabs vocabs.loader ;
 IN: environment
 
 HOOK: os-env os ( key -- value )