Core/Utils: Avoid unneccessary container copy

1 files changed, 1 insertions, 1 deletions

diff --git a/src/common/Utilities/Containers.h b/src/common/Utilities/Containers.h
index 581fbfabe6b..fb952c89b24 100644
--- a/src/common/Utilities/Containers.h
+++ b/src/common/Utilities/Containers.h
@@ -102,7 +102,7 @@ namespace Trinity
          * Note: container cannot be empty
          */
         template<class C>
-        inline auto SelectRandomWeightedContainerElement(C const& container, std::vector<double> weights) -> decltype(std::begin(container))
+        inline auto SelectRandomWeightedContainerElement(C const& container, std::vector<double> const& weights) -> decltype(std::begin(container))
         {
             auto it = std::begin(container);
             std::advance(it, urandweighted(weights.size(), weights.data()));