diff --git a/substrate/core/consensus/pow/src/lib.rs b/substrate/core/consensus/pow/src/lib.rs
index 7f282e2052..766c1c63e0 100644
--- a/substrate/core/consensus/pow/src/lib.rs
+++ b/substrate/core/consensus/pow/src/lib.rs
@@ -100,7 +100,7 @@ pub trait PowAlgorithm<B: BlockT> {
 		seal: &Seal,
 		difficulty: Self::Difficulty,
 	) -> Result<bool, String>;
-	/// Mine a seal that satisfy the given difficulty.
+	/// Mine a seal that satisfies the given difficulty.
 	fn mine(
 		&self,
 		parent: &BlockId<B>,