diff --git a/file-5.03-delta.patch b/file-5.03-delta.patch
new file mode 100644
index 0000000..c45fd87
--- /dev/null
+++ b/file-5.03-delta.patch
@@ -0,0 +1,24 @@
+diff -up file-5.03/magic/Magdir/filesystems.delta file-5.03/magic/Magdir/filesystems
+--- file-5.03/magic/Magdir/filesystems.delta	2009-11-05 16:09:43.000000000 +0100
++++ file-5.03/magic/Magdir/filesystems	2009-11-05 16:11:52.000000000 +0100
+@@ -1399,3 +1399,7 @@
+ 0               string XFSM
+ >0x200          string XFSB                     XFS filesystem metadump image
+ 
++#delta ISO    Daniel Novotny (dnovotny@redhat.com)
++0	string  DISO	Delta ISO data
++>4	belong  x	version %d
++
+diff -up file-5.03/magic/Magdir/rpm.delta file-5.03/magic/Magdir/rpm
+--- file-5.03/magic/Magdir/rpm.delta	2009-11-05 14:59:54.000000000 +0100
++++ file-5.03/magic/Magdir/rpm	2009-11-05 15:02:43.000000000 +0100
+@@ -21,3 +21,9 @@
+ >>8	beshort		11		MIPSel
+ >>8	beshort		12		ARM
+ >>10	string		x		%s
++
++#delta RPM    Daniel Novotny (dnovotny@redhat.com)
++0	string	drpm	Delta RPM
++!:mime  application/x-rpm
++>12	string 	x	%s
++
diff --git a/file.spec b/file.spec
index cdc7dcf..deb0bd1 100644
--- a/file.spec
+++ b/file.spec
@@ -5,7 +5,7 @@
 Summary: A utility for determining file types
 Name: file
 Version: 5.03
-Release: 11%{?dist}
+Release: 12%{?dist}
 License: BSD
 Group: Applications/File
 Source0: ftp://ftp.astron.com/pub/file/file-%{version}.tar.gz
@@ -20,6 +20,7 @@ Patch6: file-5.03-multilib.patch
 Patch7: file-5.03-ppcswap.patch
 Patch8: file-5.03-add-python-3.patch
 Patch9: file-5.03-djvu.patch
+Patch10: file-5.03-delta.patch
 
 Requires: file-libs = %{version}-%{release}
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
@@ -81,6 +82,8 @@ file(1) command.
 %patch8 -p1
 #fixes #531127
 %patch9 -p1
+#fixes #533151
+%patch10 -p1
 
 iconv -f iso-8859-1 -t utf-8 < doc/libmagic.man > doc/libmagic.man_
 touch -r doc/libmagic.man doc/libmagic.man_
@@ -155,6 +158,9 @@ rm -rf $RPM_BUILD_ROOT
 %endif
 
 %changelog
+* Thu Nov 05 2009 Daniel Novotny <dnovotny@redhat.com> 5.03-12
+- fix #533151 -  file command doesn't recognize deltaisos or rpm-only deltarpms
+
 * Tue Oct 27 2009 Daniel Novotny <dnovotny@redhat.com> 5.03-11
 - fix #531082 -  RFE: add detection of Python 3 bytecode
 - fix #531127 -  `file' command does not recognize mime type `image/vnd.djvu'