diff --git a/src/lex.cpp b/src/lex.cpp
index 9415d8b..5064dd7 100644
--- a/src/lex.cpp
+++ b/src/lex.cpp
@@ -26,11 +26,6 @@
 
 #include "lex.hpp"
 
-#include <cstdlib>
-
-
-#define array_size(array) (sizeof(array)/sizeof((array)[0]))
-
 
 namespace solar {