diff --git a/include/spdlog/details/os.h b/include/spdlog/details/os.h
index a55e4f85..67e64ecd 100644
--- a/include/spdlog/details/os.h
+++ b/include/spdlog/details/os.h
@@ -34,7 +34,7 @@
 # include <Windows.h>
 #endif
 
-#include "..\common.h"
+#include "../common.h"
 
 namespace spdlog
 {