--- lagged_fibonacci.hpp.orig	2008-11-27 02:10:55.000000000 +0800
+++ lagged_fibonacci.hpp	2009-02-01 23:41:14.000000000 +0800
@@ -317,7 +317,7 @@
     unsigned long mask = ~((~0u) << (w%32));   // now lowest w bits set
     RealType two32 = pow(RealType(2), 32);
     unsigned int j;
-    for(j = 0; j < long_lag && first != last; ++j, ++first) {
+    for(j = 0; j < long_lag && first != last; ++j) {
       x[j] = RealType(0);
       for(int k = 0; k < w/32 && first != last; ++k, ++first)
         x[j] += *first / pow(two32,k+1);