diff --git a/llvm/lib/Object/Archive.cpp b/llvm/lib/Object/Archive.cpp
--- a/llvm/lib/Object/Archive.cpp
+++ b/llvm/lib/Object/Archive.cpp
@@ -468,6 +468,7 @@
     : Parent(Parent) {
   if (!Start) {
     Header = nullptr;
+    StartOfFile = -1;
     return;
   }