diff --git a/basis/unix/bsd/macosx/macosx.factor b/basis/unix/bsd/macosx/macosx.factor
index 5edd1a5093..c263be7056 100644
--- a/basis/unix/bsd/macosx/macosx.factor
+++ b/basis/unix/bsd/macosx/macosx.factor
@@ -1,4 +1,5 @@
-USING: alien.syntax unix.time classes.struct ;
+USING: alien.c-types alien.syntax unix.time unix.types
+unix.types.macosx classes.struct ;
 IN: unix
 
 CONSTANT: FD_SETSIZE 1024
@@ -18,15 +19,15 @@ CONSTANT: _UTX_LINESIZE 32
 CONSTANT: _UTX_IDSIZE 4
 CONSTANT: _UTX_HOSTSIZE 256
     
-C-STRUCT: utmpx
-    { { "char" _UTX_USERSIZE } "ut_user" }
-    { { "char" _UTX_IDSIZE } "ut_id" }
-    { { "char" _UTX_LINESIZE } "ut_line" }
-    { "pid_t" "ut_pid" }
-    { "short" "ut_type" }
-    { "timeval" "ut_tv" }
-    { { "char" _UTX_HOSTSIZE } "ut_host" }
-    { { "uint" 16 } "ut_pad" } ;
+STRUCT: utmpx
+    { ut_user { char _UTX_USERSIZE } }
+    { ut_id   { char _UTX_IDSIZE   } }
+    { ut_line { char _UTX_LINESIZE } }
+    { ut_pid  pid_t }
+    { ut_type short }
+    { ut_tv   timeval }
+    { ut_host { char _UTX_HOSTSIZE } }
+    { ut_pad  { uint 16 } } ;
 
 CONSTANT: __DARWIN_MAXPATHLEN 1024
 CONSTANT: __DARWIN_MAXNAMELEN 255
@@ -37,7 +38,7 @@ STRUCT: dirent
     { d_reclen __uint16_t }
     { d_type __uint8_t }
     { d_namlen __uint8_t }
-    { d_name { "char" __DARWIN_MAXNAMELEN+1 } } ;
+    { d_name { char __DARWIN_MAXNAMELEN+1 } } ;
 
 CONSTANT: EPERM 1
 CONSTANT: ENOENT 2
diff --git a/basis/unix/bsd/netbsd/structs/structs.factor b/basis/unix/bsd/netbsd/structs/structs.factor
index f8aee1635d..1882fa830b 100644
--- a/basis/unix/bsd/netbsd/structs/structs.factor
+++ b/basis/unix/bsd/netbsd/structs/structs.factor
@@ -1,29 +1,30 @@
 ! Copyright (C) 2008 Doug Coleman.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: alien.syntax unix.time classes.struct ;
+USING: alien.c-types alien.syntax unix.time unix.types
+unix.types.netbsd classes.struct ;
 IN: unix
 
 STRUCT: sockaddr_storage
     { ss_len __uint8_t }
     { ss_family sa_family_t }
-    { __ss_pad1 { "char" _SS_PAD1SIZE } }
+    { __ss_pad1 { char _SS_PAD1SIZE } }
     { __ss_align __int64_t }
-    { __ss_pad2 { "char" _SS_PAD2SIZE } } ;
+    { __ss_pad2 { char _SS_PAD2SIZE } } ;
 
 STRUCT: exit_struct
     { e_termination uint16_t }
     { e_exit uint16_t } ;
 
-C-STRUCT: utmpx
-    { { "char" _UTX_USERSIZE } "ut_user" }
-    { { "char" _UTX_IDSIZE } "ut_id" }
-    { { "char" _UTX_LINESIZE } "ut_line" }
-    { { "char" _UTX_HOSTSIZE } "ut_host" }
-    { "uint16_t" "ut_session" }
-    { "uint16_t" "ut_type" }
-    { "pid_t" "ut_pid" }
-    { "exit_struct" "ut_exit" }
-    { "sockaddr_storage" "ut_ss" }
-    { "timeval" "ut_tv" }
-    { { "uint32_t" 10 } "ut_pad" } ;
+STRUCT: utmpx
+    { ut_user { char _UTX_USERSIZE } }
+    { ut_id   { char _UTX_IDSIZE   } }
+    { ut_line { char _UTX_LINESIZE } }
+    { ut_host { char _UTX_HOSTSIZE } }
+    { ut_session uint16_t }
+    { ut_type uint16_t }
+    { ut_pid pid_t }
+    { ut_exit exit_struct }
+    { ut_ss sockaddr_storage }
+    { ut_tv timeval }
+    { ut_pad { uint32_t 10 } } ;
 
diff --git a/basis/unix/utmpx/utmpx.factor b/basis/unix/utmpx/utmpx.factor
index f6ccf6858b..6083776fc6 100644
--- a/basis/unix/utmpx/utmpx.factor
+++ b/basis/unix/utmpx/utmpx.factor
@@ -3,7 +3,7 @@
 USING: alien.c-types alien.data alien.syntax combinators
 continuations io.encodings.string io.encodings.utf8 kernel
 sequences strings unix calendar system accessors unix.time
-calendar.unix vocabs.loader ;
+calendar.unix vocabs.loader classes.struct ;
 IN: unix.utmpx
 
 CONSTANT: EMPTY 0
@@ -39,15 +39,15 @@ M: unix new-utmpx-record
     utmpx-record new ;
     
 M: unix utmpx>utmpx-record ( utmpx -- utmpx-record )
-    [ new-utmpx-record ] dip
+    [ new-utmpx-record ] dip \ utmpx memory>struct
     {
-        [ utmpx-ut_user _UTX_USERSIZE memory>string >>user ]
-        [ utmpx-ut_id _UTX_IDSIZE memory>string >>id ]
-        [ utmpx-ut_line _UTX_LINESIZE memory>string >>line ]
-        [ utmpx-ut_pid >>pid ]
-        [ utmpx-ut_type >>type ]
-        [ utmpx-ut_tv timeval>unix-time >>timestamp ]
-        [ utmpx-ut_host _UTX_HOSTSIZE memory>string >>host ]
+        [ ut_user>> _UTX_USERSIZE memory>string >>user ]
+        [ ut_id>>   _UTX_IDSIZE memory>string >>id ]
+        [ ut_line>> _UTX_LINESIZE memory>string >>line ]
+        [ ut_pid>>  >>pid ]
+        [ ut_type>> >>type ]
+        [ ut_tv>>   timeval>unix-time >>timestamp ]
+        [ ut_host>> _UTX_HOSTSIZE memory>string >>host ]
     } cleave ;
 
 : with-utmpx ( quot -- )