diff --git a/src/tint/utils/traits/traits.h b/src/tint/utils/traits/traits.h
index 669a254..b23f264 100644
--- a/src/tint/utils/traits/traits.h
+++ b/src/tint/utils/traits/traits.h
@@ -267,7 +267,7 @@
 template <typename LHS, typename RHS>
 struct HasOperatorShiftLeft<LHS,
                             RHS,
-                            std::void_t<decltype((std::declval<LHS>() << std::declval<RHS>()))>>
+                            std::void_t<decltype(std::declval<LHS&>() << std::declval<RHS>())>>
     : std::true_type {};
 
 }  // namespace detail