diff -Nurpa kbilliards-0.8.7b.orig/src/aiplayer.cpp kbilliards-0.8.7b/src/aiplayer.cpp
--- kbilliards-0.8.7b.orig/src/aiplayer.cpp	2008-12-17 14:05:01.000000000 +0300
+++ kbilliards-0.8.7b/src/aiplayer.cpp	2008-12-17 14:07:09.000000000 +0300
@@ -21,6 +21,7 @@
 #include <iostream>
 #include <sstream>
 
+#include <cstdlib>
 
 #include <qnamespace.h>
 #include <qpen.h>