diff --git a/src/binding.c b/src/binding.c
index 50f7226..ef687c7 100644
--- a/src/binding.c
+++ b/src/binding.c
@@ -597,7 +597,7 @@ countBindingsDone ()
 
   int countDone (Binding b)
   {
-    if (b->done)
+    if ((!b->blocked) && b->done)
       {
 	count++;
       }
diff --git a/src/cost.c b/src/cost.c
index 48459ff..4d025af 100644
--- a/src/cost.c
+++ b/src/cost.c
@@ -36,7 +36,7 @@ attackCost (const System sys)
 
   cost += 10 * selfInitiators (sys);
   cost += 7 * selfResponders (sys);
-  cost += 4 * sys->num_regular_runs;
+  cost += 10 * sys->num_regular_runs;
   cost += 3 * countInitiators (sys);
   cost += 2 * countBindingsDone ();
   cost += 1 * sys->num_intruder_runs;