diff --git a/src/state/proof.rs b/src/state/proof.rs
index 6b94a8a..1d1aa76 100644
--- a/src/state/proof.rs
+++ b/src/state/proof.rs
@@ -30,7 +30,7 @@ pub struct Proof {
     /// The last time stake was deposited into this account.
     pub last_stake_at: i64,
 
-    /// The keypair which can submit hashes for mining.
+    /// The keypair which has permission to submit hashes for mining.
     pub miner: Pubkey,
 
     /// The total lifetime hashes provided by this miner.