diff --git a/src/column.rs b/src/column.rs
index 881712d..8e97aac 100644
--- a/src/column.rs
+++ b/src/column.rs
@@ -2,7 +2,7 @@ use std::iter::repeat;
 
 use ansi_term::Style;
 
-#[derive(PartialEq, Show)]
+#[derive(PartialEq, Debug, Copy)]
 pub enum Column {
     Permissions,
     FileName,
@@ -14,25 +14,20 @@ pub enum Column {
     Inode,
 }
 
-impl Copy for Column { }
-
-#[derive(PartialEq, Show)]
+#[derive(PartialEq, Debug, Copy)]
 pub enum SizeFormat {
     DecimalBytes,
     BinaryBytes,
     JustBytes,
 }
 
-impl Copy for SizeFormat { }
-
 /// Each column can pick its own **Alignment**. Usually, numbers are
 /// right-aligned, and text is left-aligned.
+#[derive(Copy)]
 pub enum Alignment {
     Left, Right,
 }
 
-impl Copy for Alignment { }
-
 impl Column {
 
     /// Get the alignment this column should use.
diff --git a/src/filetype.rs b/src/filetype.rs
index 605c7f1..81a6095 100644
--- a/src/filetype.rs
+++ b/src/filetype.rs
@@ -8,13 +8,12 @@ use ansi_term::Style;
 use ansi_term::Style::Plain;
 use ansi_term::Colour::{Red, Green, Yellow, Blue, Cyan, Fixed};
 
+#[derive(Copy)]
 pub enum FileType {
     Normal, Directory, Executable, Immediate, Compiled, Symlink, Special,
     Image, Video, Music, Lossless, Compressed, Document, Temp, Crypto,
 }
 
-impl Copy for FileType { }
-
 static IMAGE_TYPES: &'static [&'static str] = &[
     "png", "jpeg", "jpg", "gif", "bmp", "tiff", "tif",
     "ppm", "pgm", "pbm", "pnm", "webp", "raw", "arw",
diff --git a/src/options.rs b/src/options.rs
index 2c03f53..e625833 100644
--- a/src/options.rs
+++ b/src/options.rs
@@ -109,13 +109,11 @@ impl Options {
 }
 
 /// User-supplied field to sort by
-#[derive(PartialEq, Debug)]
+#[derive(PartialEq, Debug, Copy)]
 pub enum SortField {
     Unsorted, Name, Extension, Size, FileInode
 }
 
-impl Copy for SortField { }
-
 impl SortField {
 
     /// Find which field to use based on a user-supplied word.
diff --git a/src/output.rs b/src/output.rs
index 948451f..e4df83d 100644
--- a/src/output.rs
+++ b/src/output.rs
@@ -8,7 +8,7 @@ use users::OSUsers;
 
 use ansi_term::Style::Plain;
 
-#[derive(PartialEq, Show)]
+#[derive(PartialEq, Debug)]
 pub enum View {
     Details(Vec<Column>, bool),
     Lines,