Index: clang-tidy/utils/IncludeInserter.cpp
===================================================================
--- clang-tidy/utils/IncludeInserter.cpp
+++ clang-tidy/utils/IncludeInserter.cpp
@@ -71,6 +71,7 @@
                                  SourceLocation HashLocation,
                                  SourceLocation EndLocation) {
   FileID FileID = SourceMgr.getFileID(HashLocation);
+  InsertedHeaders[FileID].insert(FileName);
   if (IncludeSorterByFile.find(FileID) == IncludeSorterByFile.end()) {
     IncludeSorterByFile.insert(std::make_pair(
         FileID, llvm::make_unique<IncludeSorter>(