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-rw-r--r--src/mongo/db/query/projection_ast_util.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mongo/db/query/projection_ast_util.h b/src/mongo/db/query/projection_ast_util.h
index 231f037b48c..af89254a9a1 100644
--- a/src/mongo/db/query/projection_ast_util.h
+++ b/src/mongo/db/query/projection_ast_util.h
@@ -36,6 +36,6 @@ namespace projection_ast {
/**
* This is intended to be used for debug output, not for serialization.
*/
-BSONObj astToDebugBSON(ASTNode* root);
+BSONObj astToDebugBSON(const ASTNode* root);
} // namespace projection_ast
} // namespace mongo