Include stdlib.

diff --git a/getdate.y b/getdate.y
index c1818de..a9de991 100644 (file)
--- a/getdate.y
+++ b/getdate.y
@@ -14,6 +14,7 @@
 
 #include <stdio.h>
 #include <ctype.h>
+#include <stdlib.h>
 
 #define ISSPACE(c) (isspace ((unsigned char)c))
 #define ISALPHA(c) (isalpha ((unsigned char)c))