1 files changed, 5 insertions, 2 deletions
diff --git a/include/clang/Lex/HeaderSearch.h b/include/clang/Lex/HeaderSearch.h
index 6e24e1893ab6..ee17dcbb8b5a 100644
--- a/include/clang/Lex/HeaderSearch.h
+++ b/include/clang/Lex/HeaderSearch.h
@@ -543,10 +543,13 @@ public:
   /// \param Offset [inout] An offset within ID to start parsing. On exit,
   ///        filled by the end of the parsed contents (either EOF or the
   ///        location of an end-of-module-map pragma).
-  ///
+  /// \param OriginalModuleMapFile The original path to the module map file,
+  ///        used to resolve paths within the module (this is required when
+  ///        building the module from preprocessed source).
   /// \returns true if an error occurred, false otherwise.
   bool loadModuleMapFile(const FileEntry *File, bool IsSystem,
-                         FileID ID = FileID(), unsigned *Offset = nullptr);
+                         FileID ID = FileID(), unsigned *Offset = nullptr,
+                         StringRef OriginalModuleMapFile = StringRef());
 
   /// \brief Collect the set of all known, top-level modules.
   ///