Index: include/llvm/Bitcode/BitcodeWriterPass.h
===================================================================
--- include/llvm/Bitcode/BitcodeWriterPass.h
+++ include/llvm/Bitcode/BitcodeWriterPass.h
@@ -44,7 +44,7 @@
 ///
 /// Note that this is intended for use with the new pass manager. To construct
 /// a pass for the legacy pass manager, use the function above.
-class BitcodeWriterPass {
+class BitcodeWriterPass : public PassInfoMixin<BitcodeWriterPass> {
   raw_ostream &OS;
   bool ShouldPreserveUseListOrder;
   bool EmitSummaryIndex;