diff --git a/man/systemd-pcrlock.xml b/man/systemd-pcrlock.xml
index 4af7f13c5d..19ba4c4b17 100644
--- a/man/systemd-pcrlock.xml
+++ b/man/systemd-pcrlock.xml
@@ -105,7 +105,7 @@
cel
This reads the combined TPM2 event log and writes it to STDOUT in TCG Common Event Log
+ url="https://trustedcomputinggroup.org/resource/canonical-event-log-format/">TCG Canonical Event Log
Format (CEL-JSON) format.
diff --git a/man/systemd-pcrphase.service.xml b/man/systemd-pcrphase.service.xml
index 9c54663d3e..2dc9c8ada0 100644
--- a/man/systemd-pcrphase.service.xml
+++ b/man/systemd-pcrphase.service.xml
@@ -215,7 +215,7 @@
/run/log/systemd/tpm2-measure.log, which contains a JSON-SEQ series of objects that follow the
general structure of the TCG Common Event Log
+ url="https://trustedcomputinggroup.org/resource/canonical-event-log-format/">TCG Canonical Event Log
Format (CEL-JSON) event objects (but lack the recnum
field).
diff --git a/man/systemd.pcrlock.xml b/man/systemd.pcrlock.xml
index 27ceb48652..6f07dc8159 100644
--- a/man/systemd.pcrlock.xml
+++ b/man/systemd.pcrlock.xml
@@ -43,7 +43,7 @@
process. systemd-pcrlock1
uses such pcrlock files to analyze and predict TPM2 PCR measurements. The pcrlock files are JSON arrays
that follow a subset of the TCG Common Event Log Format
+ url="https://trustedcomputinggroup.org/resource/canonical-event-log-format/">TCG Canonical Event Log Format
(CEL-JSON) specification. Specifically the recnum, content,
and content_type record fields are not used and ignored if present. Each pcrlock file
defines one set of expected, ordered PCR measurements of a specific component of the boot.