--- linear_congruential.hpp.orig	2008-11-27 02:10:55.000000000 +0800
+++ linear_congruential.hpp	2009-01-20 17:24:42.000000000 +0800
@@ -124,7 +124,9 @@
   operator>>(std::basic_istream<CharT,Traits>& is,
              linear_congruential& lcg)
   {
-    return is >> lcg._x;
+    is >> lcg._x;
+    lcg._x  %= linear_congruential::modulus;
+    return is;
   }
  
 private: