diff --git a/src/transfer.rs b/src/transfer.rs
index bab3012..bc4cf2c 100644
--- a/src/transfer.rs
+++ b/src/transfer.rs
@@ -190,7 +190,7 @@ pub struct TransferOperation {
 /// The kind of transfer operation.
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub enum TransferKind {
-    /// A non zero value transfer CALL
+    /// A non-zero value transfer CALL
     Call,
     /// A CREATE operation
     Create,