diff --git a/src/compile.cpp b/src/compile.cpp
index 91c2a7b983..a954959885 100644
--- a/src/compile.cpp
+++ b/src/compile.cpp
@@ -5107,7 +5107,7 @@ compile(MyThread* t, object method)
 
       if (methodVirtual(t, method)) {
         classVtable(t, methodClass(t, method), methodOffset(t, method))
-          = &singletonValue(t, compiled, 0);
+          = &singletonValue(t, methodCompiled(t, method), 0);
       }
     }
   }
diff --git a/src/machine.cpp b/src/machine.cpp
index fd52aa486b..8703d103c4 100644
--- a/src/machine.cpp
+++ b/src/machine.cpp
@@ -168,7 +168,7 @@ killZombies(Thread* t, Thread* o)
 unsigned
 footprint(Thread* t)
 {
-  unsigned n = t->heapOffset + t->heapIndex;
+  unsigned n = t->heapOffset + t->heapIndex + t->backupHeapIndex;
 
   for (Thread* c = t->child; c; c = c->peer) {
     n += footprint(c);