diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md
index 38ce9eb6fbb..3b41a78e99b 100644
--- a/gcc/config/rs6000/rs6000.md
+++ b/gcc/config/rs6000/rs6000.md
@@ -920,7 +920,7 @@
    (set (match_operand:SI 0 "gpc_reg_operand" "=r")
 	(not:SI (match_dup 1)))]
   ""
-  "nor. %0,%2,%1"
+  "nor. %0,%1,%1"
   [(set_attr "type" "compare")])
 
 (define_insn ""
@@ -3975,7 +3975,7 @@
    (set (match_operand:DI 0 "gpc_reg_operand" "=r")
 	(not:DI (match_dup 1)))]
   "TARGET_POWERPC64"
-  "nor. %0,%2,%1"
+  "nor. %0,%1,%1"
   [(set_attr "type" "compare")])
 
 (define_insn ""