diff --git a/include/llvm/Support/CommandLine.h b/include/llvm/Support/CommandLine.h
index 0ab39fca38d..bf7823ed279 100644
--- a/include/llvm/Support/CommandLine.h
+++ b/include/llvm/Support/CommandLine.h
@@ -469,8 +469,7 @@ public:
 
   template<class Opt>
   void apply(Opt &O) const {
-    for (unsigned i = 0, e = static_cast<unsigned>(Values.size());
-         i != e; ++i)
+    for (size_t i = 0, e = Values.size(); i != e; ++i)
       O.getParser().addLiteralOption(Values[i].first, Values[i].second.first,
                                      Values[i].second.second);
   }
@@ -629,8 +628,7 @@ public:
     else
       ArgVal = ArgName;
 
-    for (unsigned i = 0, e = static_cast<unsigned>(Values.size());
-         i != e; ++i)
+    for (size_t i = 0, e = Values.size(); i != e; ++i)
       if (Values[i].Name == ArgVal) {
         V = Values[i].V.getValue();
         return false;