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-rw-r--r--manual/json.rst4
1 files changed, 4 insertions, 0 deletions
diff --git a/manual/json.rst b/manual/json.rst
index 5567794d..358cac90 100644
--- a/manual/json.rst
+++ b/manual/json.rst
@@ -175,3 +175,7 @@ be aware of:
shown as not filterable by default, but they will be shown as
filterable if you run :command:`qpdf --json
--decode-level=all`.
+
+- The ``encrypt`` key's values will be populated for non-encrypted
+ files. Some values will be null, and others will have values that
+ apply to unencrypted files.