diff --git a/include/llvm/Support/PathV2.h b/include/llvm/Support/PathV2.h
index e8c93a34b2b..ab9f077349f 100644
--- a/include/llvm/Support/PathV2.h
+++ b/include/llvm/Support/PathV2.h
@@ -25,6 +25,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/Twine.h"
 #include "llvm/Support/DataTypes.h"
 #include "llvm/Support/system_error.h"
 #include <ctime>