diff --git a/src/sparse_mpt/diff_trie/nodes.rs b/src/sparse_mpt/diff_trie/nodes.rs
index 4b67de9..cee9d63 100644
--- a/src/sparse_mpt/diff_trie/nodes.rs
+++ b/src/sparse_mpt/diff_trie/nodes.rs
@@ -219,7 +219,7 @@ impl DiffChildPtr {
 pub struct DiffBranchNode {
     pub fixed: Option<Arc<FixedBranchNode>>,
     /// this must have an element for children that we have in the diff trie
-    pub changed_children: SmallVec<[(u8, Option<DiffChildPtr>); 16]>,
+    pub changed_children: SmallVec<[(u8, Option<DiffChildPtr>); 2]>,
     pub aux_bits: u16,
 }