$OpenBSD$

Index: master.h
--- master.h.orig
+++ master.h
@@ -52,7 +52,7 @@ typedef unsigned char uchar;
 #include <io.h>
 #include <sys/utime.h>
 #include <steam/steam_api.h>
-#elif defined(__linux__) || defined(__APPLE__)
+#elif defined(__linux__) || defined(__APPLE__) || defined(__OpenBSD__)
 #include <unistd.h>
 #define _stricmp strcasecmp
 #define _strdup strdup
