diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 8433c93bb3db..71807d72eacc 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2005-12-26  Graham Stott  <graham.stott@btinternet.com>
+
+	PR middle-end/25568
+	* combine.c (simplify_shift_const_1 <case PLUS>):Fix enable-checking
+	rtl bootstrap failure.
+
 2005-12-25  Kazu Hirata  <kazu@codesourcery.com>
 
 	* final.c (compute_alignments): Make it static.
diff --git a/gcc/combine.c b/gcc/combine.c
index 2482bbd26e9a..1361b10d27c0 100644
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -8919,6 +8919,7 @@ simplify_shift_const_1 (enum rtx_code code, enum machine_mode result_mode,
 	      && (new = simplify_const_binary_operation (ASHIFT, result_mode,
 						         XEXP (varop, 1),
 						         GEN_INT (count))) != 0
+	      && GET_CODE (new) == CONST_INT
 	      && merge_outer_ops (&outer_op, &outer_const, PLUS,
 				  INTVAL (new), result_mode, &complement_p))
 	    {
@@ -8937,6 +8938,7 @@ simplify_shift_const_1 (enum rtx_code code, enum machine_mode result_mode,
 	      && (new = simplify_const_binary_operation (code, result_mode,
 						         XEXP (varop, 1),
 						         GEN_INT (count))) != 0
+	      && GET_CODE (new) == CONST_INT
 	      && merge_outer_ops (&outer_op, &outer_const, XOR,
 				  INTVAL (new), result_mode, &complement_p))
 	    {