diff -r e389580e3348 -r 587531b4fe0e lemon/unionfind.h
--- a/lemon/unionfind.h	Mon Dec 18 14:35:33 2006 +0000
+++ b/lemon/unionfind.h	Tue Dec 19 14:00:43 2006 +0000
@@ -312,7 +312,7 @@
         items[ak].parent += items[bk].parent;
 	items[bk].parent = ak;
       } else {
-        unlaceClass(bk);
+        unlaceClass(ak);
         items[bk].parent += items[ak].parent;
 	items[ak].parent = bk;
       }