diff --git a/file-4.23-ext4.patch b/file-4.23-ext4.patch
new file mode 100644
index 0000000..276c1de
--- /dev/null
+++ b/file-4.23-ext4.patch
@@ -0,0 +1,59 @@
+diff -up file-4.23/magic/Magdir/filesystems.ext4 file-4.23/magic/Magdir/filesystems
+--- file-4.23/magic/Magdir/filesystems.ext4	2008-02-01 09:45:02.000000000 +0100
++++ file-4.23/magic/Magdir/filesystems	2008-02-01 09:46:23.000000000 +0100
+@@ -1025,19 +1025,42 @@
+ >&-1248	belong		0		TIME optimization
+ >&-1248	belong		1		SPACE optimization
+ 
+-# ext2/ext3 filesystems - Andreas Dilger <adilger@turbolabs.com>
+-0x438	leshort		0xEF53		Linux
+->0x44c	lelong		x		rev %d
+->0x43e	leshort		x		\b.%d
+->0x45c	lelong		^0x0000004	ext2 filesystem data
+->>0x43a	leshort		^0x0000001	(mounted or unclean)
+->0x45c	lelong		&0x0000004	ext3 filesystem data
+->>0x460	lelong		&0x0000004	(needs journal recovery)
+->0x43a	leshort		&0x0000002	(errors)
+->0x460	lelong		&0x0000001	(compressed)
+-#>0x460	lelong		&0x0000002	(filetype)
+-#>0x464	lelong		&0x0000001	(sparse_super)
+->0x464	lelong		&0x0000002	(large files)
++# ext2/ext3 filesystems - Andreas Dilger <adilger@dilger.ca>
++# ext4 filesystem - Eric Sandeen <sandeen@sandeen.net>
++0x438   leshort         0xEF53          Linux
++>0x44c  lelong          x               rev %d
++>0x43e  leshort         x               \b.%d
++# No journal?  ext2
++>0x45c  lelong          ^0x0000004      ext2 filesystem data
++>>0x43a leshort         ^0x0000001      (mounted or unclean)
++# Has a journal?  ext3 or ext4
++>0x45c  lelong          &0x0000004
++#  and small INCOMPAT?
++>>0x460 lelong          <0x0000040
++#   and small RO_COMPAT?
++>>>0x464 lelong         <0x0000008      ext3 filesystem data
++#   else large RO_COMPAT?
++>>>0x464 lelong         >0x0000007      ext4 filesystem data
++#  else large INCOMPAT?
++>>0x460 lelong          >0x000003f      ext4 filesystem data
++# General flags for any ext* fs
++>0x460  lelong          &0x0000004      (needs journal recovery)
++>0x43a  leshort         &0x0000002      (errors)
++# INCOMPAT flags
++>0x460  lelong          &0x0000001      (compressed)
++#>0x460 lelong          &0x0000002      (filetype)
++#>0x460 lelong          &0x0000010      (meta bg)
++>0x460  lelong          &0x0000040      (extents)
++>0x460  lelong          &0x0000080      (64bit)
++#>0x460 lelong          &0x0000100      (mmp)
++#>0x460 lelong          &0x0000200      (flex bg)
++# RO_INCOMPAT flags
++#>0x464 lelong          &0x0000001      (sparse super)
++>0x464  lelong          &0x0000002      (large files)
++>0x464  lelong          &0x0000008      (huge files)
++#>0x464 lelong          &0x0000010      (gdt checksum)
++#>0x464 lelong          &0x0000020      (many subdirs)
++#>0x463 lelong          &0x0000040      (extra isize)
+ 
+ # SGI disk labels - Nathan Scott <nathans@debian.org>
+ 0	belong		0x0BE5A941	SGI disk label (volume header)
diff --git a/file.spec b/file.spec
index 6e9c016..18700f4 100644
--- a/file.spec
+++ b/file.spec
@@ -5,7 +5,7 @@
 Summary: A utility for determining file types
 Name: file
 Version: 4.23
-Release: 2%{?dist}
+Release: 3%{?dist}
 License: BSD
 Group: Applications/File
 Source0: ftp://ftp.astron.com/pub/file/file-%{version}.tar.gz
@@ -25,6 +25,7 @@ patch12: file-4.23-msoffice.patch
 patch13: file-4.21-efi.patch
 patch14: file-4.21-pybuild.patch
 patch15: file-4.23-tryelf.patch
+patch15: file-4.23-ext4.patch
 
 Requires: file-libs = %{version}-%{release}
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
@@ -156,6 +157,9 @@ rm -rf $RPM_BUILD_ROOT
 %endif
 
 %changelog
+* Fri Feb 01 2008 Tomas Smetana <tsmetana@redhat.com> - 4.23-3
+- fix #430927 - detect ext4 filesystems
+
 * Thu Jan 31 2008 Tomas Smetana <tsmetana@redhat.com> - 4.23-2
 - fix #430952 - wrong handling of ELF binaries