diff --git a/lib/Archive/Archive.cpp b/lib/Archive/Archive.cpp
index 6c95dbe..125b22e 100644
--- a/lib/Archive/Archive.cpp
+++ b/lib/Archive/Archive.cpp
@@ -17,6 +17,7 @@
 #include "llvm/ModuleProvider.h"
 #include "llvm/Module.h"
 #include "llvm/Support/MemoryBuffer.h"
+#include "llvm/System/MappedFile.h"
 #include "llvm/System/Process.h"
 #include <memory>
 #include <cstring>
diff --git a/lib/Archive/ArchiveReader.cpp b/lib/Archive/ArchiveReader.cpp
index 368bd32..e279a3d 100644
--- a/lib/Archive/ArchiveReader.cpp
+++ b/lib/Archive/ArchiveReader.cpp
@@ -14,6 +14,7 @@
 #include "ArchiveInternals.h"
 #include "llvm/Bitcode/ReaderWriter.h"
 #include "llvm/Support/MemoryBuffer.h"
+#include "llvm/System/MappedFile.h"
 #include "llvm/Module.h"
 #include <memory>
 using namespace llvm;
diff --git a/lib/Archive/ArchiveWriter.cpp b/lib/Archive/ArchiveWriter.cpp
index 04cc981..c73e170 100644
--- a/lib/Archive/ArchiveWriter.cpp
+++ b/lib/Archive/ArchiveWriter.cpp
@@ -13,6 +13,7 @@
 
 #include "ArchiveInternals.h"
 #include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/System/MappedFile.h"
 #include "llvm/System/Signals.h"
 #include "llvm/System/Process.h"
 #include "llvm/ModuleProvider.h"