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-rw-r--r--src/mongo/db/pipeline/document_source_index_stats.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mongo/db/pipeline/document_source_index_stats.h b/src/mongo/db/pipeline/document_source_index_stats.h
index 1c1bc521aeb..26beb7edb8b 100644
--- a/src/mongo/db/pipeline/document_source_index_stats.h
+++ b/src/mongo/db/pipeline/document_source_index_stats.h
@@ -42,7 +42,7 @@ public:
// virtuals from DocumentSource
GetNextResult getNext() final;
const char* getSourceName() const final;
- Value serialize(bool explain = false) const final;
+ Value serialize(boost::optional<ExplainOptions::Verbosity> explain = boost::none) const final;
virtual bool isValidInitialSource() const final {
return true;