diff --git a/lib/MC/MCContext.cpp b/lib/MC/MCContext.cpp
index 3b45d1670d2..7e4cdf98eef 100644
--- a/lib/MC/MCContext.cpp
+++ b/lib/MC/MCContext.cpp
@@ -157,8 +157,7 @@ MCSymbol *MCContext::CreateSymbol(StringRef Name) {
 
 MCSymbol *MCContext::GetOrCreateSymbol(const Twine &Name) {
   SmallString<128> NameSV;
-  Name.toVector(NameSV);
-  return GetOrCreateSymbol(NameSV.str());
+  return GetOrCreateSymbol(Name.toStringRef(NameSV));
 }
 
 MCSymbol *MCContext::CreateTempSymbol() {
diff --git a/lib/Option/ArgList.cpp b/lib/Option/ArgList.cpp
index 15f7e8bf4b8..fecd2371735 100644
--- a/lib/Option/ArgList.cpp
+++ b/lib/Option/ArgList.cpp
@@ -291,8 +291,7 @@ void ArgList::ClaimAllArgs() const {
 
 const char *ArgList::MakeArgString(const Twine &T) const {
   SmallString<256> Str;
-  T.toVector(Str);
-  return MakeArgString(Str.str());
+  return MakeArgString(T.toStringRef(Str));
 }
 
 const char *ArgList::GetOrMakeJoinedArgString(unsigned Index,