Update README.md

In order to use basic_logger_mt an additional include is required.
7 years ago · ad63efdaf7
parent 536f5d8203
commit ad63efdaf7
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--- 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!");