diff --git a/basis/unix/stat/freebsd/freebsd.factor b/basis/unix/stat/freebsd/freebsd.factor
index 93ed1a42db..8535e9f3fd 100644
--- a/basis/unix/stat/freebsd/freebsd.factor
+++ b/basis/unix/stat/freebsd/freebsd.factor
@@ -26,3 +26,4 @@ STRUCT: stat
 
 FUNCTION: int stat  ( c-string pathname, stat* buf ) ;
 FUNCTION: int lstat ( c-string pathname, stat* buf ) ;
+FUNCTION: int fstat ( int fd, stat* buf ) ;
diff --git a/basis/unix/stat/linux/32/32.factor b/basis/unix/stat/linux/32/32.factor
index b3becff240..d0f60d7581 100644
--- a/basis/unix/stat/linux/32/32.factor
+++ b/basis/unix/stat/linux/32/32.factor
@@ -23,6 +23,8 @@ STRUCT: stat
 
 FUNCTION: int __xstat64  ( int ver, c-string pathname, stat* buf ) ;
 FUNCTION: int __lxstat64 ( int ver, c-string pathname, stat* buf ) ;
+FUNCTION: int __fxstat64 ( int ver, int fd, stat* buf ) ;
 
 :  stat ( pathname buf -- int ) [ 1 ] 2dip __xstat64 ;
 : lstat ( pathname buf -- int ) [ 1 ] 2dip __lxstat64 ;
+: fstat ( fd buf -- int ) [ 1 ] 2dip __fxstat64 ;
diff --git a/basis/unix/stat/linux/64/64.factor b/basis/unix/stat/linux/64/64.factor
index 0862bf82a0..8913fc6556 100644
--- a/basis/unix/stat/linux/64/64.factor
+++ b/basis/unix/stat/linux/64/64.factor
@@ -23,6 +23,8 @@ STRUCT: stat
 
 FUNCTION: int __xstat64  ( int ver, c-string pathname, stat* buf ) ;
 FUNCTION: int __lxstat64 ( int ver, c-string pathname, stat* buf ) ;
+FUNCTION: int __fxstat64 ( int ver, int fd, stat* buf ) ;
 
 :  stat ( pathname buf -- int ) [ 1 ] 2dip __xstat64 ;
 : lstat ( pathname buf -- int ) [ 1 ] 2dip __lxstat64 ;
+: fstat ( fd buf -- int ) [ 1 ] 2dip __fxstat64 ;
diff --git a/basis/unix/stat/macosx/macosx.factor b/basis/unix/stat/macosx/macosx.factor
index 024cd317e8..b96c1f4eed 100644
--- a/basis/unix/stat/macosx/macosx.factor
+++ b/basis/unix/stat/macosx/macosx.factor
@@ -28,6 +28,8 @@ STRUCT: stat
 
 FUNCTION: int stat64  ( c-string pathname, stat* buf ) ;
 FUNCTION: int lstat64 ( c-string pathname, stat* buf ) ;
+FUNCTION: int fstat64 ( int fd, stat* buf ) ;
 
 : stat ( path buf -- n ) stat64 ;
 : lstat ( path buf -- n ) lstat64 ;
+: fstat ( fd buf -- n ) fstat64 ;
diff --git a/basis/unix/stat/netbsd/32/32.factor b/basis/unix/stat/netbsd/32/32.factor
index bb0a403751..f89b67c25d 100644
--- a/basis/unix/stat/netbsd/32/32.factor
+++ b/basis/unix/stat/netbsd/32/32.factor
@@ -25,6 +25,8 @@ STRUCT: stat
 
 FUNCTION: int __stat30  ( c-string pathname, stat* buf ) ;
 FUNCTION: int __lstat30 ( c-string pathname, stat* buf ) ;
+FUNCTION: int __fstat30 ( int fd, stat* buf ) ;
 
 : stat ( pathname buf -- n ) __stat30 ;
 : lstat ( pathname buf -- n ) __lstat30 ;
+: fstat ( fd buf -- n ) __fstat30 ;
diff --git a/basis/unix/stat/netbsd/64/64.factor b/basis/unix/stat/netbsd/64/64.factor
index 010dcca724..d6e2b73a25 100644
--- a/basis/unix/stat/netbsd/64/64.factor
+++ b/basis/unix/stat/netbsd/64/64.factor
@@ -25,6 +25,8 @@ STRUCT: stat
 
 FUNCTION: int __stat13 ( c-string pathname, stat* buf ) ;
 FUNCTION: int __lstat13 ( c-string pathname, stat* buf ) ;
+FUNCTION: int __fstat13 ( int fd, stat* buf ) ;
 
 : stat ( pathname buf -- n ) __stat13 ;
 : lstat ( pathname buf -- n ) __lstat13 ;
+: fstat ( fd buf -- n ) __fstat13 ;
diff --git a/basis/unix/stat/openbsd/openbsd.factor b/basis/unix/stat/openbsd/openbsd.factor
index b562d085b3..6c805e82cb 100644
--- a/basis/unix/stat/openbsd/openbsd.factor
+++ b/basis/unix/stat/openbsd/openbsd.factor
@@ -27,3 +27,4 @@ STRUCT: stat
 
 FUNCTION: int stat  ( c-string pathname, stat* buf ) ;
 FUNCTION: int lstat ( c-string pathname, stat* buf ) ;
+FUNCTION: int fstat ( int fd, stat* buf ) ;