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--- a/src/rcldb/rcldb.h
+++ b/src/rcldb/rcldb.h
@@ -121,6 +121,8 @@
     // Index-wide stats
     unsigned int dbdoccount;
     double       dbavgdoclen;
+    size_t       mindoclen;
+    size_t       maxdoclen;
 };
 
 inline bool has_prefix(const string& trm)