diff --git a/src/llvm-project/llvm/tools/llvm-objdump/llvm-objdump.h b/src/llvm-project/llvm/tools/llvm-objdump/llvm-objdump.h
index 390fc62..99bf191 100644
--- a/src/llvm-project/llvm/tools/llvm-objdump/llvm-objdump.h
+++ b/src/llvm-project/llvm/tools/llvm-objdump/llvm-objdump.h
@@ -18,6 +18,7 @@
 
 namespace llvm {
 class StringRef;
+class Twine;
 
 namespace object {
 class ELFObjectFileBase;
@@ -39,6 +40,7 @@
 extern cl::opt<std::string> MCPU;
 extern cl::opt<bool> NoShowRawInsn;
 extern cl::opt<bool> NoLeadingAddr;
+extern cl::opt<std::string> Prefix;
 extern cl::opt<bool> PrintImmHex;
 extern cl::opt<bool> PrivateHeaders;
 extern cl::opt<bool> Relocations;
@@ -126,11 +128,11 @@
 void printSymbol(const object::ObjectFile *O, const object::SymbolRef &Symbol,
                  StringRef FileName, StringRef ArchiveName,
                  StringRef ArchitectureName, bool DumpDynamic);
-LLVM_ATTRIBUTE_NORETURN void reportError(StringRef File, Twine Message);
+LLVM_ATTRIBUTE_NORETURN void reportError(StringRef File, const Twine &Message);
 LLVM_ATTRIBUTE_NORETURN void reportError(Error E, StringRef FileName,
                                          StringRef ArchiveName = "",
                                          StringRef ArchitectureName = "");
-void reportWarning(Twine Message, StringRef File);
+void reportWarning(const Twine &Message, StringRef File);
 
 template <typename T, typename... Ts>
 T unwrapOrError(Expected<T> EO, Ts &&... Args) {