diff --git a/clang/lib/AST/Decl.cpp b/clang/lib/AST/Decl.cpp
index f2e8c50..b32e5d9 100644
--- a/clang/lib/AST/Decl.cpp
+++ b/clang/lib/AST/Decl.cpp
@@ -14,6 +14,7 @@
 #include "clang/AST/Decl.h"
 #include "Linkage.h"
 #include "clang/AST/ASTContext.h"
+#include "clang/AST/ASTDiagnostic.h"
 #include "clang/AST/ASTLambda.h"
 #include "clang/AST/ASTMutationListener.h"
 #include "clang/AST/CanonicalType.h"
@@ -49,7 +50,6 @@
 #include "clang/Basic/TargetCXXABI.h"
 #include "clang/Basic/TargetInfo.h"
 #include "clang/Basic/Visibility.h"
-#include "clang/Frontend/FrontendDiagnostic.h"
 #include "llvm/ADT/APSInt.h"
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/None.h"