diff --git a/libraries/concurrent-merkle-tree/src/concurrent_merkle_tree.rs b/libraries/concurrent-merkle-tree/src/concurrent_merkle_tree.rs
index 811e4f25d1c..4853b566dc4 100644
--- a/libraries/concurrent-merkle-tree/src/concurrent_merkle_tree.rs
+++ b/libraries/concurrent-merkle-tree/src/concurrent_merkle_tree.rs
@@ -106,9 +106,10 @@ impl<const MAX_DEPTH: usize, const MAX_BUFFER_SIZE: usize>
             return Err(ConcurrentMerkleTreeError::TreeAlreadyInitialized);
         }
         let mut rightmost_proof = Path::default();
-        let empty_node_cache = [Node::default(); MAX_DEPTH];
+        let mut empty_node_cache = [Node::default(); MAX_DEPTH];
         for (i, node) in rightmost_proof.proof.iter_mut().enumerate() {
             *node = empty_node_cached::<MAX_DEPTH>(i as u32, &empty_node_cache);
+            empty_node_cache[i] = *node;
         }
         let mut path = [Node::default(); MAX_DEPTH];
         for (i, node) in path.iter_mut().enumerate() {