diff --git a/lib/Bitcode/Reader/BitcodeReader.cpp b/lib/Bitcode/Reader/BitcodeReader.cpp
index 96b7f4d..63c8597 100644
--- a/lib/Bitcode/Reader/BitcodeReader.cpp
+++ b/lib/Bitcode/Reader/BitcodeReader.cpp
@@ -2323,7 +2323,7 @@
     if (A->getParent() == 0) {
       // We found at least one unresolved value.  Nuke them all to avoid leaks.
       for (unsigned i = ModuleValueListSize, e = ValueList.size(); i != e; ++i){
-        if ((A = dyn_cast<Argument>(ValueList.back())) && A->getParent() == 0) {
+        if ((A = dyn_cast<Argument>(ValueList[i])) && A->getParent() == 0) {
           A->replaceAllUsesWith(UndefValue::get(A->getType()));
           delete A;
         }