diff --git a/dependencies/lmdb/libraries/liblmdb/mdb.c b/dependencies/lmdb/libraries/liblmdb/mdb.c
index 07fce8d1b..570a859a8 100644
--- a/dependencies/lmdb/libraries/liblmdb/mdb.c
+++ b/dependencies/lmdb/libraries/liblmdb/mdb.c
@@ -3305,7 +3305,7 @@ mdb_txn_renew0(MDB_txn *txn)
 				if (r->mr_pid != env->me_pid || r->mr_txnid != (txnid_t)-1) {
 					last_error = malloc(100);
 					if (r->mr_pid != env->me_pid)
-						sprintf(last_error, "The reader lock pid %u doesn't match env pid %u", r->mr_pid, env->me_pid);
+						sprintf(last_error, "The reader lock pid %u, txn %i, doesn't match env pid %u", r->mr_pid, r->mr_txnid, env->me_pid);
 					else
 						sprintf(last_error, "The reader lock has a txn id %i", r->mr_txnid);
 					return MDB_BAD_RSLOT;