diff --git a/src/symmetric/tweak_hash/poseidon.rs b/src/symmetric/tweak_hash/poseidon.rs
index 3ae8db4..4171da6 100644
--- a/src/symmetric/tweak_hash/poseidon.rs
+++ b/src/symmetric/tweak_hash/poseidon.rs
@@ -540,7 +540,7 @@ impl<
 
                 // Apply the sponge hash to produce the leaf.
                 // This absorbs all chain ends and squeezes out the final hash.
-                let packed_leaves = poseidon_sponge::<PackedF, _, _, _>(
+                let packed_leaves = poseidon_sponge::<PackedF, _, MERGE_COMPRESSION_WIDTH, HASH_LEN>(
                     &sponge_perm,
                     &capacity_val,
                     &packed_leaf_input,