diff --git a/include/components/logger.hpp b/include/components/logger.hpp
index 5c7d1ba2..0d270927 100644
--- a/include/components/logger.hpp
+++ b/include/components/logger.hpp
@@ -100,7 +100,7 @@ class logger {
   /**
    * Convert string
    */
-  const char* convert(string arg) const;  // NOLINT
+  const char* convert(const string& arg) const;
 
   /**
    * Convert thread id
diff --git a/src/components/logger.cpp b/src/components/logger.cpp
index f482eeaf..f1e968c8 100644
--- a/src/components/logger.cpp
+++ b/src/components/logger.cpp
@@ -1,6 +1,7 @@
+#include "components/logger.hpp"
+
 #include <unistd.h>
 
-#include "components/logger.hpp"
 #include "errors.hpp"
 #include "settings.hpp"
 #include "utils/concurrency.hpp"
@@ -12,7 +13,7 @@ POLYBAR_NS
 /**
  * Convert string
  */
-const char* logger::convert(string arg) const {  // NOLINT
+const char* logger::convert(const string& arg) const {
   return arg.c_str();
 }