diff --git a/frame/beefy-mmr/primitives/src/lib.rs b/frame/beefy-mmr/primitives/src/lib.rs
index f56be8bcafe5b..f88fb89acaaab 100644
--- a/frame/beefy-mmr/primitives/src/lib.rs
+++ b/frame/beefy-mmr/primitives/src/lib.rs
@@ -29,7 +29,7 @@
 //! Inner nodes are created by concatenating child hashes and hashing again. The implementation
 //! does not perform any sorting of the input data (leaves) nor when inner nodes are created.
 //!
-//! If the number of leaves is not even, last leave (hash of) is promoted to the upper layer.
+//! If the number of leaves is not even, last leaf (hash of) is promoted to the upper layer.
 
 pub use sp_runtime::traits::Keccak256;
 use sp_runtime::{app_crypto::sp_core, sp_std, traits::Hash as HashT};
diff --git a/primitives/merkle-mountain-range/src/lib.rs b/primitives/merkle-mountain-range/src/lib.rs
index 6a1c941886cb8..06d8c72de5b9c 100644
--- a/primitives/merkle-mountain-range/src/lib.rs
+++ b/primitives/merkle-mountain-range/src/lib.rs
@@ -25,7 +25,7 @@ use sp_debug_derive::RuntimeDebug;
 use sp_runtime::traits;
 #[cfg(not(feature = "std"))]
 use sp_std::prelude::Vec;
-use sp_std::{fmt, vec};
+use sp_std::fmt;
 
 /// A type to describe node position in the MMR (node index).
 pub type NodeIndex = u64;