diff --git a/src/mm.rs b/src/mm.rs
index bb7b3d0..301ed55 100644
--- a/src/mm.rs
+++ b/src/mm.rs
@@ -33,6 +33,8 @@ use getopt::GetOpt;
 use strerror::StrError;
 use sysexits::{ EX_IOERR, EX_USAGE };
 
+use ArgMode::*;
+
 enum ArgMode { In, Out }
 
 fn main() -> ExitCode {
@@ -57,12 +59,12 @@ fn main() -> ExitCode {
 			Ok("i") => { /* add inputs */
 				let input = opt.arg().unwrap();
 				ins.push(input);
-				mode = Some(ArgMode::In);
+				mode = Some(In);
 			},
 			Ok("o") => { /* add output */
 				let output = opt.arg().unwrap(); 
 				outs.push(output);
-				mode = Some(ArgMode::Out);
+				mode = Some(Out);
 			},
 			Err(_) | Ok(_) => {
 				eprintln!("{}", usage);
@@ -77,8 +79,8 @@ fn main() -> ExitCode {
 	if let Some(m) = mode {
 		for arg in remaining {
 			match m {
-				ArgMode::In => ins.push(arg.to_string()),
-				ArgMode::Out => outs.push(arg.to_string()),
+				In => ins.push(arg.to_string()),
+				Out => outs.push(arg.to_string()),
 			};
 		}
 	}