1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Parse/ParseDeclCXX.cpp b/lib/Parse/ParseDeclCXX.cpp
index 4956c1095c..1a1eeb9402 100644
--- a/lib/Parse/ParseDeclCXX.cpp
+++ b/lib/Parse/ParseDeclCXX.cpp
@@ -13,6 +13,7 @@
 
 #include "clang/Parse/Parser.h"
 #include "RAIIObjectsForParser.h"
+#include "clang/Basic/CharInfo.h"
 #include "clang/Basic/OperatorKinds.h"
 #include "clang/Parse/ParseDiagnostic.h"
 #include "clang/Sema/DeclSpec.h"
@@ -3032,7 +3033,7 @@ IdentifierInfo *Parser::TryParseCXX11AttributeIdentifier(SourceLocation &Loc) {
     // starts with an alphabetical character.
     SmallString<8> SpellingBuf;
     StringRef Spelling = PP.getSpelling(Tok.getLocation(), SpellingBuf);
-    if (std::isalpha(Spelling[0])) {
+    if (isLetter(Spelling[0])) {
       Loc = ConsumeToken();
       return &PP.getIdentifierTable().get(Spelling);
     }