diff --git a/docs/merkle-sum-trie.md b/docs/merkle-sum-trie.md
index 1c3678d..299c0e6 100644
--- a/docs/merkle-sum-trie.md
+++ b/docs/merkle-sum-trie.md
@@ -255,8 +255,8 @@ The root of the tree is a slice of bytes. `MerkleRoot` is an alias for `[]byte`.
 This design enables easily passing around the data (e.g. on-chain)
 while maintaining primitive usage in different use cases (e.g. proofs).
 
-`MerkleRoot` provides helpers, such as retrieving the `Sum(sumTrie bool)uint64`
-to interface with data it captures.
+`MerkleRoot` provides helpers, such as retrieving the `Sum() uint64` to
+interface with data it captures.
 
 ## Nil Values
 
diff --git a/docs/smt.md b/docs/smt.md
index f8bdaa1..bae85d2 100644
--- a/docs/smt.md
+++ b/docs/smt.md
@@ -349,8 +349,8 @@ The root of the tree is a slice of bytes. `MerkleRoot` is an alias for `[]byte`.
 This design enables easily passing around the data (e.g. on-chain)
 while maintaining primitive usage in different use cases (e.g. proofs).
 
-`MerkleRoot` provides helpers, such as retrieving the `Sum(sumTrie bool)uint64`
-to interface with data it captures. However, for the SMT it **always** panics,
+`MerkleRoot` provides helpers, such as retrieving the `Sum() uint64` to
+interface with data it captures. However, for the SMT it **always** panics,
 as there is no sum.
 
 ## Proofs