diff --git a/callisto.h b/callisto.h
index e5224c4..c26eb36 100644
--- a/callisto.h
+++ b/callisto.h
@@ -8,8 +8,6 @@
 
 #include <lua.h>
 
-#define LUA_USE_POSIX
-
 #define CALLISTO_VERSION_MAJOR		"0"
 #define CALLISTO_VERSION_MINOR		"1"
 #define CALLISTO_VERSION_RELEASE	"0"