diff --git a/CHANGELOG.md b/CHANGELOG.md
index 14246c66..57490c9d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,12 @@ All versions prior to 0.0.9 are untracked.
 
 ## [Unreleased]
 
+### Fixed
+
+* Fixed an incorrect interaction between `--desc=auto` and `--format=json`;
+  `--desc=auto` now includes the description in the generated JSON report,
+  as intended ([#399](https://github.com/pypa/pip-audit/pull/399))
+
 ## [2.4.5]
 
 ### Fixed
diff --git a/pip_audit/_cli.py b/pip_audit/_cli.py
index 2a4d4f5d..537f6626 100644
--- a/pip_audit/_cli.py
+++ b/pip_audit/_cli.py
@@ -107,7 +107,7 @@ def to_bool(self, format_: OutputFormatChoice) -> bool:
         elif self is VulnerabilityDescriptionChoice.Off:
             return False
         elif self is VulnerabilityDescriptionChoice.Auto:
-            return bool(format_.value is OutputFormatChoice.Json)
+            return bool(format_ is OutputFormatChoice.Json)
         else:
             assert_never(self)