diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 5fddf41caf18..9524865fc0cb 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2013-12-06  Vladimir Makarov  <vmakarov@redhat.com>
+
+	* config/rs6000/rs600.md (*bswapdi2_64bit): Remove ?? from the
+	constraint.
+
 2013-12-06  Caroline Tice  <cmtice@google.com>
 
 	Submitting patch from Stephen Checkoway, s@cs.jhu.edu
diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md
index 4de7c3a2f6e4..efeb2c4dbf72 100644
--- a/gcc/config/rs6000/rs6000.md
+++ b/gcc/config/rs6000/rs6000.md
@@ -2379,7 +2379,7 @@
 
 ;; Non-power7/cell, fall back to use lwbrx/stwbrx
 (define_insn "*bswapdi2_64bit"
-  [(set (match_operand:DI 0 "reg_or_mem_operand" "=&r,Z,??&r")
+  [(set (match_operand:DI 0 "reg_or_mem_operand" "=&r,Z,&r")
 	(bswap:DI (match_operand:DI 1 "reg_or_mem_operand" "Z,r,r")))
    (clobber (match_scratch:DI 2 "=&b,&b,&r"))
    (clobber (match_scratch:DI 3 "=&r,&r,&r"))