diff --git a/include/tiles/osm/tmp_file.h b/include/tiles/osm/tmp_file.h
new file mode 100644
index 0000000..46ea713
--- /dev/null
+++ b/include/tiles/osm/tmp_file.h
@@ -0,0 +1,43 @@
+#pragma once
+
+#include <cstdio>
+#include <string>
+
+#include "boost/filesystem.hpp"
+
+#include "utl/verify.h"
+
+namespace tiles {
+
+struct tmp_file {
+  explicit tmp_file(std::string path)
+      : path_{std::move(path)},
+#ifdef _MSC_VER
+        file_(std::fopen(path_.c_str(), "wb+"))
+#else
+        file_(std::fopen(path_.c_str(), "wb+e"))
+#endif
+  {
+    utl::verify(file_ != nullptr, "tmp_file: unable to open file {}", path_);
+  }
+
+  ~tmp_file() {
+    if (file_ != nullptr) {
+      std::fclose(file_);
+      boost::filesystem::remove(path_);
+    }
+    file_ = nullptr;
+  }
+
+  tmp_file(tmp_file const&) = default;
+  tmp_file(tmp_file&&) = default;
+  tmp_file& operator=(tmp_file const&) = default;
+  tmp_file& operator=(tmp_file&&) = default;
+
+  int fileno() const { return ::fileno(file_); }
+
+  std::string path_;
+  FILE* file_;
+};
+
+}  // namespace tiles
\ No newline at end of file
diff --git a/src/osm/load_osm.cc b/src/osm/load_osm.cc
index 0fd41ff..3715312 100644
--- a/src/osm/load_osm.cc
+++ b/src/osm/load_osm.cc
@@ -17,6 +17,7 @@
 #include "tiles/db/tile_database.h"
 #include "tiles/osm/feature_handler.h"
 #include "tiles/osm/hybrid_node_idx.h"
+#include "tiles/osm/tmp_file.h"
 #include "tiles/util.h"
 #include "tiles/util_parallel.h"
 
@@ -29,37 +30,6 @@ namespace orel = osmium::relations;
 namespace om = osmium::memory;
 namespace oeb = osmium::osm_entity_bits;
 
-struct tmp_file {
-  explicit tmp_file(std::string path)
-      : path_{std::move(path)},
-#ifdef _MSC_VER
-        file_(std::fopen(path_.c_str(), "wb+"))
-#else
-        file_(std::fopen(path_.c_str(), "wb+e"))
-#endif
-  {
-    utl::verify(file_ != nullptr, "tmp_file: unable to open file {}", path_);
-  }
-
-  ~tmp_file() {
-    if (file_ != nullptr) {
-      std::fclose(file_);
-      boost::filesystem::remove(path_);
-    }
-    file_ = nullptr;
-  }
-
-  tmp_file(tmp_file const&) = default;
-  tmp_file(tmp_file&&) = default;
-  tmp_file& operator=(tmp_file const&) = default;
-  tmp_file& operator=(tmp_file&&) = default;
-
-  int fileno() const { return ::fileno(file_); }
-
-  std::string path_;
-  FILE* file_;
-};
-
 void load_osm(tile_db_handle& db_handle, feature_inserter_mt& inserter,
               std::string const& osm_fname, std::string const& osm_profile,
               std::string const& tmp_dname) {