diff --git a/hdf-4.2r2-sparc.patch b/hdf-4.2r2-sparc.patch
new file mode 100644
index 0000000..dbd9b19
--- /dev/null
+++ b/hdf-4.2r2-sparc.patch
@@ -0,0 +1,78 @@
+diff -Nru HDF4.2r2.orig/hdf/src/hdfi.h HDF4.2r2/hdf/src/hdfi.h
+--- HDF4.2r2.orig/hdf/src/hdfi.h	2007-09-17 18:45:17.000000000 +0300
++++ HDF4.2r2/hdf/src/hdfi.h	2008-01-06 07:23:42.000000000 +0200
+@@ -77,6 +77,7 @@
+ #define     DFMT_LINUX64        0x4441
+ #define     DFMT_POWERPC64      0x1111
+ #define     DFMT_LINUXPPC       0x1111
++#define     DFMT_LINUXSPARC     0x1111
+ 
+ /* I/O library constants */
+ #define UNIXUNBUFIO 1
+@@ -1444,6 +1445,66 @@
+ 
+ #endif /*Linux PPC */
+ 
++/* Linux Sparc32/64 */
++#if defined __sparc__ || !defined __sparc64__
++
++#ifdef GOT_MACHINE
++If you get an error on this line more than one machine type has been defined.
++Please check your Makefile.
++#endif
++#define GOT_MACHINE
++
++#include <sys/file.h>               /* for unbuffered i/o stuff */
++#include <sys/stat.h>
++#define DF_MT             DFMT_LINUXPPC
++typedef void              VOID;
++typedef void              *VOIDP;
++typedef char              *_fcd;
++typedef char              char8;
++typedef unsigned char     uchar8;
++typedef char              int8;
++typedef unsigned char     uint8;
++typedef short int         int16;
++typedef unsigned short int uint16;
++#ifdef _LP64 /* 64-bit environment */
++typedef int               int32;
++typedef unsigned int      uint32;
++#else /* 32-bit environment */
++typedef long int          int32;
++typedef unsigned long int uint32;
++#endif
++typedef int               intn;
++typedef unsigned int      uintn;
++typedef int               intf;     /* size of INTEGERs in Fortran compiler */
++typedef float             float32;
++typedef double            float64;
++#ifdef _LP64 /* 64-bit environment */
++typedef long              hdf_pint_t;   /* an integer the same size as a pointer */
++#else /* 32-bit environment */
++typedef int               hdf_pint_t;   /* an integer the same size as a pointer */
++#endif
++#define FNAME_POST_UNDERSCORE
++#define _fcdtocp(desc) (desc)
++#ifdef  HAVE_FMPOOL
++#define FILELIB PAGEBUFIO  /* enable page buffering */
++#else
++#define FILELIB UNIXBUFIO
++#endif
++
++/* JPEG #define's - Look in the JPEG docs before changing - (Q) */
++
++/* Determine the memory manager we are going to use. Valid values are: */
++/*  MEM_DOS, MEM_ANSI, MEM_NAME, MEM_NOBS.  See the JPEG docs for details on */
++/*  what each does */
++#define JMEMSYS         MEM_ANSI
++
++#ifdef __GNUC__
++#define HAVE_STDC
++#define INCLUDES_ARE_ANSI
++#endif
++
++#endif /* Linux Sparc32/64 */
++
+ /*#ifndef GOT_MACHINE
+ No machine type has been defined.  Your Makefile needs to have someing like
+ -DSUN or -DUNICOS in order for the HDF internal structures to be defined
diff --git a/hdf.spec b/hdf.spec
index a167b6d..d918934 100644
--- a/hdf.spec
+++ b/hdf.spec
@@ -1,6 +1,6 @@
 Name: hdf
 Version: 4.2r2
-Release: 4%{?dist}
+Release: 5%{?dist}
 Summary: A general purpose library and file format for storing scientific data
 License: BSD
 Group: System Environment/Libraries
@@ -8,6 +8,7 @@ URL: http://hdf.ncsa.uiuc.edu/hdf4.html
 Source0: ftp://ftp.hdfgroup.org/HDF/HDF_Current/src/HDF%{version}.tar.gz
 Patch0: hdf-4.2r1p4-maxavailfiles.patch
 Patch1: hdf-4.2r2-ppc.patch
+Patch2: hdf-4.2r2-sparc.patch
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 BuildRequires: flex byacc libjpeg-devel zlib-devel
 BuildRequires: gcc-gfortran
@@ -37,6 +38,7 @@ HDF development headers and libraries.
 %setup -q -n HDF%{version}
 %patch -p1 -b .maxavailfiles
 %patch1 -p1 -b .ppc
+%patch2 -p1 -b .sparc
 
 chmod a-x *hdf/*/*.c hdf/*/*.h
 # restore include file timestamps modified by patching
@@ -107,6 +109,9 @@ rm -rf $RPM_BUILD_ROOT
 
 
 %changelog
+* Mon Jan  7 2008 Orion Poplawski <orion@cora.nwra.com> 4.2.r2-5
+- Add patches for sparc support (bug #427639)
+
 * Mon Oct 29 2007 Patrice Dumas <pertusus@free.fr> 4.2r2-4
 - install the netcdf.h file that describes the netcdf2 hdf enabled
   API