diff --git a/substrate/primitives/runtime/src/lib.rs b/substrate/primitives/runtime/src/lib.rs
index 96706dd919..3752e31cbe 100644
--- a/substrate/primitives/runtime/src/lib.rs
+++ b/substrate/primitives/runtime/src/lib.rs
@@ -234,7 +234,7 @@ impl BuildStorage for () {
 /// Consensus engine unique ID.
 pub type ConsensusEngineId = [u8; 4];
 
-/// Signature verify that can work with any known signature types..
+/// Signature verify that can work with any known signature types.
 #[cfg_attr(feature = "std", derive(Serialize, Deserialize))]
 #[derive(Eq, PartialEq, Clone, Encode, Decode, MaxEncodedLen, RuntimeDebug, TypeInfo)]
 pub enum MultiSignature {