diff --git a/basis/bootstrap/io/io.factor b/basis/bootstrap/io/io.factor
index 45cd2a1ce2..789bb1556b 100644
--- a/basis/bootstrap/io/io.factor
+++ b/basis/bootstrap/io/io.factor
@@ -5,10 +5,8 @@ IN: bootstrap.io
 "bootstrap.compiler" require
 "bootstrap.threads" require
 
-[
-    "io.backend." {
-        { [ "io-backend" get ] [ "io-backend" get ] }
-        { [ os unix? ] [ "unix." os name>> append ] }
-        { [ os windows? ] [ "windows" ] }
-    } cond append require
-] when
+"io.backend." {
+    { [ "io-backend" get ] [ "io-backend" get ] }
+    { [ os unix? ] [ "unix." os name>> append ] }
+    { [ os windows? ] [ "windows" ] }
+} cond append require