diff --git a/lib/Analysis/PostDominators.cpp b/lib/Analysis/PostDominators.cpp
index c241646..2bc3edb 100644
--- a/lib/Analysis/PostDominators.cpp
+++ b/lib/Analysis/PostDominators.cpp
@@ -54,7 +54,9 @@
 //
 void cfg::DominatorSet::calcForwardDominatorSet(const Method *M) {
   assert(Root && M && "Can't build dominator set of null method!");
-  assert(Root->use_size() == 0 && "Root node has predecessors in method!");
+  assert(Root->pred_begin() == Root->pred_end() &&
+	 "Root node has predecessors in method!");
+
   bool Changed;
   do {
     Changed = false;