diff --git a/cpl/inc/container.h b/cpl/inc/container.h
index 9df9c98..4a7ed83 100644
--- a/cpl/inc/container.h
+++ b/cpl/inc/container.h
@@ -128,10 +128,10 @@ auto alternating_insertion(Args&&... args) {
     // 5-arg -> Treat arguments as iterators, e.g. (first1, last1, first2, last2, result)
     auto [first1, last1, first2, last2, result] = [](Args&&... args) {
         if constexpr (sizeof...(args) == 3) {
-            const auto&& [in1, in2, out] = std::forward_as_tuple(args...);
-            return std::forward_as_tuple(in1.begin(), in1.end(), in2.begin(), in2.end(), out.begin());
+            auto&& [in1, in2, out] = std::forward_as_tuple(args...);
+            return std::tuple(in1.begin(), in1.end(), in2.begin(), in2.end(), out.begin());
         } else if constexpr (sizeof...(args) == 5) {
-            return std::forward_as_tuple(args...);
+            return std::tuple(std::forward<Args>(args)...);
         } else {
             static_assert(false, "Invalid number of arguments");
         }
diff --git a/cpl/inc/tree.h b/cpl/inc/tree.h
index 8a742fe..0394d95 100644
--- a/cpl/inc/tree.h
+++ b/cpl/inc/tree.h
@@ -9,6 +9,7 @@
 
 #include "xcore.h"
 
+#include <algorithm>
 #include <iterator>
 #include <numeric>
 #include <vector>
diff --git a/tests/cpl/container_alternating_insertion/test.cpp b/tests/cpl/container_alternating_insertion/test.cpp
index f56011c..b7d0a4b 100644
--- a/tests/cpl/container_alternating_insertion/test.cpp
+++ b/tests/cpl/container_alternating_insertion/test.cpp
@@ -9,7 +9,6 @@ int main() {
     using namespace std;
     using namespace cpl;
 
-    // Args by iterator
     {
         vector<int> first_input{};
         vector<int> second_input{};