1 files changed, 1 insertions, 4 deletions
diff --git a/include/clang/Basic/VirtualFileSystem.h b/include/clang/Basic/VirtualFileSystem.h
index 1df4947dd7e8..bab88c90b0a8 100644
--- a/include/clang/Basic/VirtualFileSystem.h
+++ b/include/clang/Basic/VirtualFileSystem.h
@@ -299,10 +299,7 @@ public:
   llvm::ErrorOr<std::string> getCurrentWorkingDirectory() const override {
     return WorkingDirectory;
   }
-  std::error_code setCurrentWorkingDirectory(const Twine &Path) override {
-    WorkingDirectory = Path.str();
-    return std::error_code();
-  }
+  std::error_code setCurrentWorkingDirectory(const Twine &Path) override;
 };
 
 /// \brief Get a globally unique ID for a virtual file or directory.