diff --git a/3party/cttrie/cttrie.hpp b/3party/cttrie/cttrie.hpp
index 9cf594c..f13262b 100644
--- a/3party/cttrie/cttrie.hpp
+++ b/3party/cttrie/cttrie.hpp
@@ -1,3 +1,5 @@
+#pragma once
+
 #if defined(__clang__)
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wshorten-64-to-32"
diff --git a/generator/osm_element.cpp b/generator/osm_element.cpp
index 570ddad..561cdd3 100644
--- a/generator/osm_element.cpp
+++ b/generator/osm_element.cpp
@@ -6,7 +6,6 @@
 #include "3party/cttrie/cttrie.hpp"
 
 #include <algorithm>
-#include <cstring>
 #include <sstream>
 
 std::string DebugPrint(OsmElement::EntityType type)