diff --git a/source/durandal/image.rs b/source/durandal/image.rs
index 01998f5..aa539ba 100644
--- a/source/durandal/image.rs
+++ b/source/durandal/image.rs
@@ -178,7 +178,7 @@ pub struct Color8(u8, u8, u8);
 
 /// An RGB16 image.
 #[cfg_attr(feature = "serde_obj", derive(serde::Serialize))]
-#[derive(Debug)]
+#[derive(Debug, Eq, PartialEq)]
 pub struct Image16
 {
    w: usize,
@@ -190,7 +190,7 @@ pub struct Image16
 
 /// An RGB8 image.
 #[cfg_attr(feature = "serde_obj", derive(serde::Serialize))]
-#[derive(Debug)]
+#[derive(Debug, Eq, PartialEq)]
 pub struct Image8
 {
    w: usize,
diff --git a/source/durandal/sound.rs b/source/durandal/sound.rs
index a417aa3..075aaab 100644
--- a/source/durandal/sound.rs
+++ b/source/durandal/sound.rs
@@ -83,7 +83,7 @@ impl Sound for Sound16
 
 /// A 16-bit PCM stream.
 #[cfg_attr(feature = "serde_obj", derive(serde::Serialize))]
-#[derive(Debug)]
+#[derive(Debug, Eq, PartialEq)]
 pub struct Sound16
 {
    rate:   u16,
diff --git a/source/marathon/snd.rs b/source/marathon/snd.rs
index 967cbab..44426c6 100644
--- a/source/marathon/snd.rs
+++ b/source/marathon/snd.rs
@@ -124,7 +124,7 @@ pub fn read_sounds(b: &[u8]) -> ResultS<Vec<SoundTable>>
 }
 
 /// A sound definition containing one, many or no sounds.
-#[derive(Debug)]
+#[derive(Debug, Eq, PartialEq)]
 pub struct SoundDef
 {
    /// The volume type for this sound.
diff --git a/source/marathon/wad.rs b/source/marathon/wad.rs
index c5b319a..31889fe 100644
--- a/source/marathon/wad.rs
+++ b/source/marathon/wad.rs
@@ -135,7 +135,7 @@ pub fn read_wad(b: &[u8]) -> ResultS<Wad>
 
 /// Any kind of chunk in an `Entry`.
 #[cfg_attr(feature = "serde_obj", derive(serde::Serialize))]
-#[derive(Debug)]
+#[derive(Debug, Eq, PartialEq)]
 pub enum Chunk
 {
    /// A `PICT` chunk.
@@ -187,7 +187,7 @@ pub enum Chunk
 
 /// An entry containing chunks and application-specific data.
 #[cfg_attr(feature = "serde_obj", derive(serde::Serialize))]
-#[derive(Debug)]
+#[derive(Debug, Eq, PartialEq)]
 pub struct Entry
 {
    /// All of the chunks in this `Entry`.
@@ -199,7 +199,7 @@ pub struct Entry
 
 /// A Map file containing entries.
 #[cfg_attr(feature = "serde_obj", derive(serde::Serialize))]
-#[derive(Debug)]
+#[derive(Debug, Eq, PartialEq)]
 pub struct Wad
 {
    /// The original name of this file.