diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md
index 58d116160d9..0be372d1441 100644
--- a/gcc/config/rs6000/rs6000.md
+++ b/gcc/config/rs6000/rs6000.md
@@ -3574,7 +3574,7 @@
 ;; are preferred.  Otherwise, we'd try to reload the output instead of
 ;; giving the SCRATCH mq.
 (define_insn ""
-  [(set (match_operand:TI 0 "reg_or_mem_operand" "=Q,m,r,r,r")
+  [(set (match_operand:TI 0 "reg_or_mem_operand" "=Q,m,????r,????r,????r")
 	(match_operand:TI 1 "reg_or_mem_operand" "r,r,r,Q,m"))
    (clobber (match_scratch:SI 2 "=q,q#X,X,X,X"))]
   "TARGET_POWER && (gpc_reg_operand (operands[0], TImode)