diff --git a/libs/prof/source/profiler.cpp b/libs/prof/source/profiler.cpp
index 29a05931..17a82b1b 100644
--- a/libs/prof/source/profiler.cpp
+++ b/libs/prof/source/profiler.cpp
@@ -124,13 +124,10 @@ namespace psemek::prof
 				auto it1 = t1.children.find(it2->first);
 				if (it1 == t1.children.end())
 				{
-					it1 = t1.children.insert(*it2).first;
+					it1 = t1.children.insert({it2->first, profiler_tree{}}).first;
 					t1.children_list.push_back(it1);
 				}
-				else
-				{
-					it1->second = merge(std::move(it1->second), it2->second);
-				}
+				it1->second = merge(std::move(it1->second), it2->second);
 			}
 
 			return t1;