Fix typo

1 files changed, 2 insertions, 2 deletions

diff --git a/src/args.rs b/src/args.rs
index 638f90d..7e84b48 100644
--- a/src/args.rs
+++ b/src/args.rs
@@ -42,12 +42,12 @@ pub struct CommandContext<'a, T>(::std::marker::PhantomData<(&'a str, T)>);
 ///     }
 /// }
 /// ```
-pub trait ArgumentType<'i, T: StringReader<'i>, S, E> {
+pub trait ArgumentType<'i, R: StringReader<'i>, S, E> {
     /// The parsed type of the argument.
     type Result: Sized + 'static + ::std::any::Any;
 
     /// Parses an argument of this type, returning the parsed argument.
-    fn parse(&self, reader: &mut T) -> Result<Self::Result, E>;
+    fn parse(&self, reader: &mut R) -> Result<Self::Result, E>;
 
     /// Creates suggestions for this argument.
     // The hope here is that S is lightweight enough for one to clone into the