1 files changed, 6 insertions, 0 deletions
diff --git a/libcxx/test/support/counting_predicates.h b/libcxx/test/support/counting_predicates.h
index 3f86bf2a3993..ef3c293109a9 100644
--- a/libcxx/test/support/counting_predicates.h
+++ b/libcxx/test/support/counting_predicates.h
@@ -63,6 +63,12 @@ public:
   constexpr counting_predicate(Predicate pred, int& count) : pred_(std::move(pred)), count_(&count) {}
 
   template <class... Args>
+  constexpr decltype(auto) operator()(Args&& ...args) {
+    ++(*count_);
+    return pred_(std::forward<Args>(args)...);
+  }
+
+  template <class... Args>
   constexpr decltype(auto) operator()(Args&& ...args) const {
     ++(*count_);
     return pred_(std::forward<Args>(args)...);