diff --git a/llvm/lib/Support/VirtualFileSystem.cpp b/llvm/lib/Support/VirtualFileSystem.cpp
index 9c1c9905fa292..25d057bd9c842 100644
--- a/llvm/lib/Support/VirtualFileSystem.cpp
+++ b/llvm/lib/Support/VirtualFileSystem.cpp
@@ -749,7 +749,7 @@ class InMemoryDirectory : public InMemoryNode {
   }
 
   InMemoryNode *addChild(StringRef Name, std::unique_ptr<InMemoryNode> Child) {
-    return Entries.insert(make_pair(Name, std::move(Child)))
+    return Entries.insert(make_pair(Name.str(), std::move(Child)))
         .first->second.get();
   }