diff --git a/sc2/src/sc2code/starcon.c b/sc2/src/sc2code/starcon.c
index 8cbbe6fa6..bd7caed06 100644
--- a/sc2/src/sc2code/starcon.c
+++ b/sc2/src/sc2code/starcon.c
@@ -16,6 +16,7 @@
  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  */
 
+#include <stdlib.h>
 
 #include "encount.h"
 #include "element.h"