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-rw-r--r--src/mongo/db/pipeline/pipeline_d.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/mongo/db/pipeline/pipeline_d.h b/src/mongo/db/pipeline/pipeline_d.h
index 154ef36a824..11a6ded8542 100644
--- a/src/mongo/db/pipeline/pipeline_d.h
+++ b/src/mongo/db/pipeline/pipeline_d.h
@@ -20,6 +20,7 @@
namespace mongo {
class DocumentSourceCursor;
+ class ExpressionContext;
class Pipeline;
/*