diff --git a/src/provider/pedersen.rs b/src/provider/pedersen.rs
index 8c09954a4..d1a0389c0 100644
--- a/src/provider/pedersen.rs
+++ b/src/provider/pedersen.rs
@@ -23,7 +23,7 @@ pub struct CommitmentKey<G: Group> {
 }
 
 impl<G: Group> Len for CommitmentKey<G> {
-  fn len(&self) -> usize {
+  fn length(&self) -> usize {
     self.ck.len()
   }
 }
diff --git a/src/spartan/ppsnark.rs b/src/spartan/ppsnark.rs
index 75afe6e91..0f6aba207 100644
--- a/src/spartan/ppsnark.rs
+++ b/src/spartan/ppsnark.rs
@@ -847,7 +847,7 @@ impl<G: Group, EE: EvaluationEngineTrait<G, CE = G::CE>> RelaxedR1CSSNARKTrait<G
     S: &R1CSShape<G>,
   ) -> Result<(Self::ProverKey, Self::VerifierKey), NovaError> {
     // check the provided commitment key meets minimal requirements
-    assert!(ck.len() >= Self::commitment_key_floor()(S));
+    assert!(ck.length() >= Self::commitment_key_floor()(S));
     let (pk_ee, vk_ee) = EE::setup(ck);
 
     // pad the R1CS matrices
diff --git a/src/traits/commitment.rs b/src/traits/commitment.rs
index 1fd156b3d..a6d7db6c3 100644
--- a/src/traits/commitment.rs
+++ b/src/traits/commitment.rs
@@ -76,7 +76,7 @@ pub trait CommitmentTrait<G: Group>:
 /// Note this does not impose any memory representation contraints on the structure.
 pub trait Len {
   /// Returns the length of the structure.
-  fn len(&self) -> usize;
+  fn length(&self) -> usize;
 }
 
 /// A trait that ties different pieces of the commitment generation together