diff --git a/task1/mergesort_mt.h b/task1/mergesort_mt.h
index fd833fb..282a8e8 100644
--- a/task1/mergesort_mt.h
+++ b/task1/mergesort_mt.h
@@ -57,6 +57,11 @@ private:
     auto split(std::span<T> &data, int depth, const int &mdepth, std::recursive_mutex &mutex) -> void {
         if (std::distance(data.begin(), data.end()) <= 1) {
             return;
+        } else if (std::distance(data.begin(), data.end()) == 2) {
+            if(cmp(data[1], data[0])) {
+                std::swap(data[0], data[1]);
+                return;
+            }
         }
 
         auto mid = data.begin();