diff --git a/gcc43-pr37103.patch b/gcc43-pr37103.patch
new file mode 100644
index 0000000..c7c3195
--- /dev/null
+++ b/gcc43-pr37103.patch
@@ -0,0 +1,56 @@
+2008-08-13  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/37103
+	* fold-const.c (fold_widened_comparison): Do not allow
+	sign changes that change the result even if shorter type
+	is wider than arg1_unw's type.
+
+	* gcc.c-torture/execute/20080813-1.c: New test.
+
+--- gcc/fold-const.c.jj	2008-08-13 19:46:11.000000000 +0200
++++ gcc/fold-const.c	2008-08-13 20:18:21.000000000 +0200
+@@ -6733,10 +6733,8 @@ fold_widened_comparison (enum tree_code 
+   if ((code == EQ_EXPR || code == NE_EXPR
+        || TYPE_UNSIGNED (TREE_TYPE (arg0)) == TYPE_UNSIGNED (shorter_type))
+       && (TREE_TYPE (arg1_unw) == shorter_type
+-	  || (TYPE_PRECISION (shorter_type)
+-	      > TYPE_PRECISION (TREE_TYPE (arg1_unw)))
+ 	  || ((TYPE_PRECISION (shorter_type)
+-	       == TYPE_PRECISION (TREE_TYPE (arg1_unw)))
++	       >= TYPE_PRECISION (TREE_TYPE (arg1_unw)))
+ 	      && (TYPE_UNSIGNED (shorter_type)
+ 		  == TYPE_UNSIGNED (TREE_TYPE (arg1_unw))))
+ 	  || (TREE_CODE (arg1_unw) == INTEGER_CST
+--- gcc/testsuite/gcc.c-torture/execute/20080813-1.c.jj	2008-08-13 20:22:56.000000000 +0200
++++ gcc/testsuite/gcc.c-torture/execute/20080813-1.c	2008-08-13 20:22:10.000000000 +0200
+@@ -0,0 +1,30 @@
++/* PR middle-end/37103 */
++
++extern void abort (void);
++
++void
++foo (unsigned short x)
++{
++  signed char y = -1;
++  if (x == y)
++    abort ();
++}
++
++void
++bar (unsigned short x)
++{
++  unsigned char y = -1;
++  if (x == y)
++    abort ();
++}
++
++int
++main (void)
++{
++  if (sizeof (int) == sizeof (short))
++    return 0;
++  foo (-1);
++  if (sizeof (short) > 1)
++    bar (-1);
++  return 0;
++}
diff --git a/gcc43.spec b/gcc43.spec
index 572d8b6..1ffee81 100644
--- a/gcc43.spec
+++ b/gcc43.spec
@@ -143,6 +143,7 @@ Patch13: gcc43-i386-libgomp.patch
 Patch14: gcc43-rh251682.patch
 Patch15: gcc43-sparc-config-detection.patch
 Patch16: gcc43-libgomp-omp_h-multilib.patch
+Patch17: gcc43-pr37103.patch
 
 # On ARM EABI systems, we do want -gnueabi to be part of the
 # target triple.
@@ -443,6 +444,7 @@ which are required to run programs compiled with the GNAT.
 %patch14 -p0 -b .rh251682~
 %patch15 -p0 -b .sparc-config-detection~
 %patch16 -p0 -b .libgomp-omp_h-multilib~
+%patch17 -p0 -b .pr37103~
 
 tar xzf %{SOURCE4}
 
@@ -1664,13 +1666,14 @@ fi
 %doc rpm.doc/changelogs/libmudflap/ChangeLog*
 
 %changelog
-* Tue Aug 12 2008 Jakub Jelinek <jakub@redhat.com> 4.3.1-7
+* Thu Aug 14 2008 Jakub Jelinek <jakub@redhat.com> 4.3.1-7
 - update from gcc-4_3-branch
   - PRs bootstrap/35752, c++/36688, c++/36999, c++/37016, c/35746,
 	fortran/36582, libgcj/31890, middle-end/35432, middle-end/36691,
 	middle-end/37014, middle-end/37026, middle-end/37042,
 	rtl-optimization/35542, rtl-optimization/36998, target/35659,
 	target/36613, tree-optimization/36991
+- fix folding of widened comparisons (PR middle-end/37103)
 
 * Fri Aug  1 2008 Jakub Jelinek <jakub@redhat.com> 4.3.1-6
 - update from gcc-4_3-branch