diff --git a/include/dbus_utility.hpp b/include/dbus_utility.hpp
index 947bc86..e45bb9a 100644
--- a/include/dbus_utility.hpp
+++ b/include/dbus_utility.hpp
@@ -48,8 +48,8 @@
                                  std::string& result)
 {
     int count = 0;
-    std::string::const_iterator first = path.begin();
-    std::string::const_iterator last = path.end();
+    auto first = path.begin();
+    auto last = path.end();
     for (auto it = path.begin(); it < path.end(); it++)
     {
         // skip first character as it's either a leading slash or the first
@@ -80,8 +80,7 @@
     {
         first++;
     }
-    result = path.substr(static_cast<size_t>(first - path.begin()),
-                         static_cast<size_t>(last - first));
+    result = path.substr(first - path.begin(), last - first);
     return true;
 }