diff --git a/labs/core_bound/function_inlining_1/solution.cpp b/labs/core_bound/function_inlining_1/solution.cpp
index 6a8bd257..21fd2915 100644
--- a/labs/core_bound/function_inlining_1/solution.cpp
+++ b/labs/core_bound/function_inlining_1/solution.cpp
@@ -5,6 +5,6 @@
 
 void solution(std::array<S, N> &arr) {
   std::sort(arr.begin(), arr.end(), [](const S &a, const S &b) {
-    return std::tie(a.key1, a.key2) < std::tie(b.key1, b.key2);
+    return std::tuple(a.key1, a.key2) < std::tuple(b.key1, b.key2);
   });
 }