diff --git a/clang-tools-extra/clang-tidy/utils/TransformerClangTidyCheck.cpp b/clang-tools-extra/clang-tidy/utils/TransformerClangTidyCheck.cpp
--- a/clang-tools-extra/clang-tidy/utils/TransformerClangTidyCheck.cpp
+++ b/clang-tools-extra/clang-tidy/utils/TransformerClangTidyCheck.cpp
@@ -104,7 +104,8 @@
       Diag << FixItHint::CreateReplacement(T.Range, T.Replacement);
       break;
     case transformer::EditKind::AddInclude:
-      Diag << Inserter.createMainFileIncludeInsertion(T.Replacement);
+      Diag << Inserter.createIncludeInsertion(
+          Result.SourceManager->getFileID(T.Range.getBegin()), T.Replacement);
       break;
     }
 }