diff --git a/CHANGES b/CHANGES
index aba1a092..134149d3 100644
--- a/CHANGES
+++ b/CHANGES
@@ -18,6 +18,7 @@ LMDB 0.9.17 Release Engineering
 	Fix ITS#7969 use __sync_synchronize on non-x86
 	Fix ITS#8311 page_split from update_key
 	Fix ITS#8312 loose pages in nested txn
+	Fix ITS#8313 mdb_rebalance dummy cursor
 	Added mdb_txn_id() (ITS#7994)
 	Added robust mutex support
 	Miscellaneous cleanup/simplification
diff --git a/mdb.c b/mdb.c
index f906ab72..0c5e6f35 100644
--- a/mdb.c
+++ b/mdb.c
@@ -8199,6 +8199,7 @@ mdb_rebalance(MDB_cursor *mc)
 			mn.mc_ki[mn.mc_top] += mc->mc_ki[mn.mc_top] + 1;
 			/* We want mdb_rebalance to find mn when doing fixups */
 			if (mc->mc_flags & C_SUB) {
+				dummy.mc_flags = C_INITIALIZED;
 				dummy.mc_next = mc->mc_txn->mt_cursors[mc->mc_dbi];
 				mc->mc_txn->mt_cursors[mc->mc_dbi] = &dummy;
 				dummy.mc_xcursor = (MDB_xcursor *)&mn;