diff --git a/include/featherlog/log_formatter.hpp b/include/featherlog/log_formatter.hpp
index 6e61e77..6063c17 100644
--- a/include/featherlog/log_formatter.hpp
+++ b/include/featherlog/log_formatter.hpp
@@ -2,15 +2,15 @@
 #define FEATHERLOG_LOG_FORMATTER_HPP
 
 #include <string>
+#include <featherlog/flog_definitions.h>
 
-namespace flog
-{
-    class FLOG_API LogFormatter
-    {
+namespace flog {
+    class FLOG_API LogFormatter {
     public:
         virtual ~LogFormatter() = default;
-        virtual FLOG_CALL std::string format() = 0;
+
+        virtual std::string FLOG_CALL format() = 0;
     };
 }
 
-#endif
\ No newline at end of file
+#endif
diff --git a/include/featherlog/log_level.hpp b/include/featherlog/log_level.hpp
index 540bcc2..065162b 100644
--- a/include/featherlog/log_level.hpp
+++ b/include/featherlog/log_level.hpp
@@ -3,10 +3,9 @@
 
 #include <cstdint>
 
-namespace flog
-{
-    enum class LogLevel : uint8_t
-    {
+namespace flog {
+    using LogLevelType = uint8_t;
+    enum class LogLevel : LogLevelType {
         TRACE = 0,
         DEBUG = 1,
         INFO = 2,
@@ -14,8 +13,8 @@ namespace flog
         ERROR = 4,
         FATAL = 5,
 
-	OFF = 0xff,
+        OFF = std::numeric_limits<LogLevelType>::max()
     };
 }
 
-#endif
\ No newline at end of file
+#endif
diff --git a/include/featherlog/log_manager.hpp b/include/featherlog/log_manager.hpp
index 62f5ff3..a55898c 100644
--- a/include/featherlog/log_manager.hpp
+++ b/include/featherlog/log_manager.hpp
@@ -14,35 +14,33 @@
 #include <featherlog/log_outputter.hpp>
 #include <featherlog/flog_definitions.h>
 
-namespace flog
-{
-    class FLOG_API LogManager : public std::enable_shared_from_this<LogManager>
-    {
+namespace flog {
+    class FLOG_API LogManager : public std::enable_shared_from_this<LogManager> {
         friend class LoggerCallback;
 
     public:
-        LogManager(const LogManager&) = delete;
-        LogManager& operator=(const LogManager&) = delete;
-        LogManager(LogManager&&) = delete;
-        LogManager& operator=(LogManager&&) = delete;
+        LogManager(const LogManager &) = delete;
+        LogManager &operator=(const LogManager &) = delete;
+        LogManager(LogManager &&) = delete;
+        LogManager &operator=(LogManager &&) = delete;
 
-        static std::shared_ptr<LogManager> create();
+        static std::shared_ptr<LogManager> FLOG_CALL create();
 
         ~LogManager();
 
-        LogLevel get_min_log_level() const noexcept;
-        void set_min_log_level(LogLevel level) noexcept;
+        LogLevel FLOG_CALL get_min_log_level() const noexcept;
+        void FLOG_CALL set_min_log_level(LogLevel level) noexcept;
 
-        void add_outputter(std::unique_ptr<LogOutputter> outputter);
+        void FLOG_CALL add_outputter(std::unique_ptr<LogOutputter> outputter);
 
-        std::shared_ptr<Logger> get_logger(const std::string& name);
+        std::shared_ptr<Logger> FLOG_CALL get_logger(const std::string &name);
 
-        size_t clean_unused_loggers();
+        size_t FLOG_CALL clean_unused_loggers();
 
     private:
         LogManager() noexcept = default;
 
-        void print_log(const LogMessage& message) const;
+        void FLOG_CALL print_log(const LogMessage &message) const;
 
         std::atomic<LogLevel> m_minLogLevel{LogLevel::DEBUG};