diff --git a/CHANGELOG.md b/CHANGELOG.md
index 585cdde9..8994c84e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 
 ## Other
 
+- Document `StripAnsiMode` and its variants in rustdoc, see #4067 (@ump45nose)
 - Update Cargo dependencies to resolve current RustSec advisories, see #3861 (@TyceHerrman)
 - Add instructions for removing fish help abbreviations to README, see #3655 (@claw-explorer). Closes #3536
 - Add .NET slnx extension, see #3682 (@ltrzesniewski)
diff --git a/src/preprocessor.rs b/src/preprocessor.rs
index a9b8e712..c19d0092 100644
--- a/src/preprocessor.rs
+++ b/src/preprocessor.rs
@@ -302,11 +302,21 @@ pub fn strip_overstrike(line: &str, first_backspace: usize) -> String {
     output
 }
 
+/// Specify when to strip ANSI escape sequences from the input.
+///
+/// Used for both the `--strip-ansi` and the `--sanitize` option, the latter
+/// implying the former with the same value.
 #[derive(Debug, PartialEq, Clone, Copy, Default)]
 pub enum StripAnsiMode {
+    /// Keep escape sequences in the output
     #[default]
     Never,
+
+    /// Strip escape sequences from the output
     Always,
+
+    /// Strip escape sequences unless the syntax highlighting language is plain
+    /// text, in which case they may be part of what the input wants to display
     Auto,
 }