diff --git a/README.md b/README.md
index e51f2721..7b3d39d7 100644
--- a/README.md
+++ b/README.md
@@ -79,6 +79,8 @@ async...                Elapsed: 0.349851       2,858,358/sec
 #### Basic usage
 ```c++
 #include "spdlog/spdlog.h"
+#include "spdlog/sinks/basic_file_sink.h"
+
 int main() 
 {
     spdlog::info("Welcome to spdlog!");
diff --git a/include/spdlog/common.h b/include/spdlog/common.h
index a44dc00c..c7e20c2f 100644
--- a/include/spdlog/common.h
+++ b/include/spdlog/common.h
@@ -72,7 +72,7 @@
 #if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
 using filename_t = std::wstring;
 #define SPDLOG_FILENAME_T(s) L##s
-SPDLOG_INLINE std::string filename_to_str(const filename_t &filename)
+inline std::string filename_to_str(const filename_t &filename)
 {
     std::wstring_convert<std::codecvt_utf8<wchar_t>, wchar_t> c;
     return c.to_bytes(filename);
diff --git a/include/spdlog/spdlog.h b/include/spdlog/spdlog.h
index cc4c8a47..0c2589e8 100644
--- a/include/spdlog/spdlog.h
+++ b/include/spdlog/spdlog.h
@@ -328,7 +328,10 @@ inline void critical(const wchar_t *fmt, const Args &... args)
 //
 
 #define SPDLOG_LOGGER_CALL(logger, level, ...)                                                                                             \
-    logger->log(spdlog::source_loc{SPDLOG_FILE_BASENAME(__FILE__), __LINE__, SPDLOG_FUNCTION}, level, __VA_ARGS__)
+    do {                                                                                                                                   \
+        if (logger->should_log(level))                                                                                                     \
+            logger->log(spdlog::source_loc{SPDLOG_FILE_BASENAME(__FILE__), __LINE__, SPDLOG_FUNCTION}, level, __VA_ARGS__);                \
+    } while (0)
 
 #if SPDLOG_ACTIVE_LEVEL <= SPDLOG_LEVEL_TRACE
 #define SPDLOG_LOGGER_TRACE(logger, ...) SPDLOG_LOGGER_CALL(logger, spdlog::level::trace, __VA_ARGS__)