1 files changed, 1 insertions, 0 deletions
diff --git a/lex.l b/lex.l
index 8b07952..2a64635 100644
--- a/lex.l
+++ b/lex.l
@@ -9,6 +9,7 @@
 %{
 
 #include <X11/X.h>
+#include <stdlib.h>
 #include "gram.h"
 #include "constants.h"
 #if defined(FLEX_SCANNER) && !defined(YY_FLEX_LEX_COMPAT) && !defined(__UNIXOS2__)