diff --git a/include/spdlog/details/os.h b/include/spdlog/details/os.h
index e97d4b71..9233ed57 100644
--- a/include/spdlog/details/os.h
+++ b/include/spdlog/details/os.h
@@ -25,6 +25,7 @@
 #define WIN32_LEAN_AND_MEAN
 #endif
 #include <windows.h>
+#include <process.h>
 
 #ifdef __MINGW32__
 #include <share.h>