diff --git a/gcc/config/rs6000/constraints.md b/gcc/config/rs6000/constraints.md
index 114ba8ac2eb..155395d28f7 100644
--- a/gcc/config/rs6000/constraints.md
+++ b/gcc/config/rs6000/constraints.md
@@ -77,7 +77,7 @@
 (define_constraint "M"
   "constant greater than 31"
   (and (match_code "const_int")
-       (match_test "(ival) > 31")))
+       (match_test "ival > 31")))
 
 (define_constraint "N"
   "positive constant that is an exact power of two"