diff --git a/CHANGELOG.md b/CHANGELOG.md
index b994e2a48..8d05b7a77 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 ## 0.63 (unreleased)
 
+### Command Line Interface
+
+Difftastic no longer accepts the `--missing-as-empty`. This has had no
+effect since 0.46.
+
 ### Parsing
 
 File detection now supports Windows-1252 encoded test (an extension of
diff --git a/difft.1 b/difft.1
index 2a3a1e6ee..5abefb135 100644
--- a/difft.1
+++ b/difft.1
@@ -78,10 +78,6 @@ Don\[cq]t consider comments when diffing.
 Print the all the languages supported by difftastic, along with their
 extensions.
 .TP
-\f[B]\-\-missing\-as\-empty\f[R]
-Treat paths that don\[cq]t exist as equivalent to an empty file.
-Only applies when diffing files, not directories.
-.TP
 \f[B]\-\-override\f[R] \f[I]GLOB:NAME\f[R]
 Associate this glob pattern with this language, overriding normal
 language detection.
diff --git a/difft.1.md b/difft.1.md
index fe037b8a5..b988ade12 100644
--- a/difft.1.md
+++ b/difft.1.md
@@ -85,11 +85,6 @@ OPTIONS
 
 : Print the all the languages supported by difftastic, along with their extensions.
 
-**\-\-missing-as-empty**
-
-: Treat paths that don't exist as equivalent to an empty file. Only applies when diffing
-  files, not directories.
-
 **\-\-override** _GLOB:NAME_
 
 : Associate this glob pattern with this language, overriding normal language detection.
diff --git a/src/options.rs b/src/options.rs
index 9ac6ba740..517b00ff2 100644
--- a/src/options.rs
+++ b/src/options.rs
@@ -249,10 +249,6 @@ json: Output the results as a machine-readable JSON array with an element per fi
                 .env("DFT_SKIP_UNCHANGED")
                 .help("Don't display anything if a file is unchanged.")
         )
-        .arg(
-            Arg::new("missing-as-empty").long("missing-as-empty")
-                .help("Treat paths that don't exist as equivalent to an empty file. Only applies when diffing files, not directories.")
-        )
         .arg(
             Arg::new("override").long("override")
                 .value_name("GLOB:NAME")