diff --git a/basis/unix/statfs/freebsd/freebsd.factor b/basis/unix/statfs/freebsd/freebsd.factor
index e6a033e09d..efd12b7d6c 100644
--- a/basis/unix/statfs/freebsd/freebsd.factor
+++ b/basis/unix/statfs/freebsd/freebsd.factor
@@ -1,6 +1,6 @@
 ! Copyright (C) 2008 Doug Coleman.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: alien.syntax ;
+USING: alien.syntax unix.types ;
 IN: unix.statfs.freebsd
 
 CONSTANT: MFSNAMELEN      16            ! length of type name including null */
diff --git a/basis/unix/statfs/linux/linux.factor b/basis/unix/statfs/linux/linux.factor
index 6550ee572e..20688680fb 100644
--- a/basis/unix/statfs/linux/linux.factor
+++ b/basis/unix/statfs/linux/linux.factor
@@ -1,6 +1,6 @@
 ! Copyright (C) 2008 Doug Coleman.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: alien.syntax ;
+USING: alien.syntax unix.types ;
 IN: unix.statfs.linux
 
 C-STRUCT: statfs64
diff --git a/basis/unix/statfs/macosx/macosx.factor b/basis/unix/statfs/macosx/macosx.factor
index f80eb29ccd..c262949730 100644
--- a/basis/unix/statfs/macosx/macosx.factor
+++ b/basis/unix/statfs/macosx/macosx.factor
@@ -2,7 +2,8 @@
 ! See http://factorcode.org/license.txt for BSD license.
 USING: alien.c-types io.encodings.utf8 io.encodings.string
 kernel sequences unix.stat accessors unix combinators math
-grouping system alien.strings math.bitwise alien.syntax ;
+grouping system alien.strings math.bitwise alien.syntax
+unix.types ;
 IN: unix.statfs.macosx
 
 CONSTANT: MNT_RDONLY  HEX: 00000001
diff --git a/basis/unix/statfs/openbsd/openbsd.factor b/basis/unix/statfs/openbsd/openbsd.factor
index f495f2af4e..456883514a 100644
--- a/basis/unix/statfs/openbsd/openbsd.factor
+++ b/basis/unix/statfs/openbsd/openbsd.factor
@@ -1,6 +1,6 @@
 ! Copyright (C) 2008 Doug Coleman.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: alien.syntax ;
+USING: alien.syntax unix.types ;
 IN: unix.statfs.openbsd
 
 CONSTANT: MFSNAMELEN 16