1 files changed, 2 insertions, 1 deletions
diff --git a/clang/lib/Sema/SemaDeclAttr.cpp b/clang/lib/Sema/SemaDeclAttr.cpp
index 8aedaf7973e..4c8d098158e 100644
--- a/clang/lib/Sema/SemaDeclAttr.cpp
+++ b/clang/lib/Sema/SemaDeclAttr.cpp
@@ -19,6 +19,7 @@
 #include "clang/AST/DeclObjC.h"
 #include "clang/AST/DeclTemplate.h"
 #include "clang/AST/Expr.h"
+#include "clang/Basic/CharInfo.h"
 #include "clang/Basic/SourceManager.h"
 #include "clang/Basic/TargetInfo.h"
 #include "clang/Sema/DeclSpec.h"
@@ -4478,7 +4479,7 @@ static void handleUuidAttr(Sema &S, Decl *D, const AttributeList &Attr) {
           S.Diag(Attr.getLoc(), diag::err_attribute_uuid_malformed_guid);
           return;
         }
-      } else if (!isxdigit(*I)) {
+      } else if (!isHexDigit(*I)) {
         S.Diag(Attr.getLoc(), diag::err_attribute_uuid_malformed_guid);
         return;
       }