diff --git a/gcc/testsuite/g++.dg/warn/Wparentheses-33.C b/gcc/testsuite/g++.dg/warn/Wparentheses-33.C
index cc5038e8ff6..daa2208084f 100644
--- a/gcc/testsuite/g++.dg/warn/Wparentheses-33.C
+++ b/gcc/testsuite/g++.dg/warn/Wparentheses-33.C
@@ -1,4 +1,5 @@
 // PR c++/112765
+// { dg-additional-options "-Wparentheses" }
 
 struct A {
   A& operator=(const A&);