diff --git a/man/systemd-cryptenroll.xml b/man/systemd-cryptenroll.xml
index d5fdb54cdd..58a4626768 100644
--- a/man/systemd-cryptenroll.xml
+++ b/man/systemd-cryptenroll.xml
@@ -299,6 +299,24 @@
signatures likely will validate against pre-existing certificates.
+
+ BOOL
+
+ When enrolling a TPM2 device, controls whether to require the user to enter a PIN
+ when unlocking the volume in addition to PCR binding, based on TPM2 policy authentication. Defaults
+ to no. Despite being called PIN, any character can be used, not just numbers.
+
+
+ Note that incorrect PIN entry when unlocking increments the
+ TPM dictionary attack lockout mechanism, and may lock out users for a prolonged time, depending on
+ its configuration. The lockout mechanism is a global property of the TPM,
+ systemd-cryptenroll does not control or configure the lockout mechanism. You may
+ use tpm2-tss tools to inspect or configure the dictionary attack lockout, with
+ tpm2_getcap1 and
+ tpm2_dictionarylockout1
+ commands, respectively.
+
+
SLOT