diff --git a/tools/llvm-ar/llvm-ar.cpp b/tools/llvm-ar/llvm-ar.cpp
index 09efeca3daf..00dcc39e9f1 100644
--- a/tools/llvm-ar/llvm-ar.cpp
+++ b/tools/llvm-ar/llvm-ar.cpp
@@ -20,6 +20,7 @@
 #include <iostream>
 #include <algorithm>
 #include <iomanip>
+#include <memory>
 
 using namespace llvm;