diff --git a/README.md b/README.md
index d15c2a1f5..4d2f7444c 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 <!--
-Copyright 2024 New Vector Ltd
+Copyright 2024-2025 New Vector Ltd
 
 SPDX-License-Identifier: AGPL-3.0-only
 -->
@@ -265,7 +265,7 @@ kubectl create secret tls ess-certificate -n ess --cert=path/to/cert/file --key=
 kubectl create secret tls ess-chat-certificate -n ess --cert=path/to/cert/file --key=path/to/key/file
 kubectl create secret tls ess-matrix-certificate -n ess --cert=path/to/cert/file --key=path/to/key/file
 kubectl create secret tls ess-auth-certificate -n ess --cert=path/to/cert/file --key=path/to/key/file
-kubectl create secret tls ess-mtrc-certificate -n ess --cert=path/to/cert/file --key=path/to/key/file
+kubectl create secret tls ess-mrtc-certificate -n ess --cert=path/to/cert/file --key=path/to/key/file
 kubectl create secret tls ess-well-known-certificate -n ess --cert=path/to/cert/file --key=path/to/key/file
 ```
 
diff --git a/charts/matrix-stack/ci/fragments/quick-setup-certificates.yaml b/charts/matrix-stack/ci/fragments/quick-setup-certificates.yaml
index af28e3879..e35c66784 100644
--- a/charts/matrix-stack/ci/fragments/quick-setup-certificates.yaml
+++ b/charts/matrix-stack/ci/fragments/quick-setup-certificates.yaml
@@ -20,4 +20,4 @@ synapse:
 
 wellKnownDelegation:
   ingress:
-    tlsSecret: ess-well-knowncertificate
+    tlsSecret: ess-well-known-certificate
diff --git a/charts/matrix-stack/ci/quick-setup-certificates-pg-external-values.yaml b/charts/matrix-stack/ci/quick-setup-certificates-pg-external-values.yaml
index 5c8d32206..6f8ef098a 100644
--- a/charts/matrix-stack/ci/quick-setup-certificates-pg-external-values.yaml
+++ b/charts/matrix-stack/ci/quick-setup-certificates-pg-external-values.yaml
@@ -41,4 +41,4 @@ synapse:
     user: your-synapse-user
 wellKnownDelegation:
   ingress:
-    tlsSecret: ess-well-knowncertificate
+    tlsSecret: ess-well-known-certificate
diff --git a/charts/matrix-stack/ci/quick-setup-certificates-pg-with-helm-values.yaml b/charts/matrix-stack/ci/quick-setup-certificates-pg-with-helm-values.yaml
index be4a387ef..da396fbc7 100644
--- a/charts/matrix-stack/ci/quick-setup-certificates-pg-with-helm-values.yaml
+++ b/charts/matrix-stack/ci/quick-setup-certificates-pg-with-helm-values.yaml
@@ -25,4 +25,4 @@ synapse:
     tlsSecret: ess-matrix-certificate
 wellKnownDelegation:
   ingress:
-    tlsSecret: ess-well-knowncertificate
+    tlsSecret: ess-well-known-certificate
diff --git a/newsfragments/555.fixed.md b/newsfragments/555.fixed.md
new file mode 100644
index 000000000..b5587ded1
--- /dev/null
+++ b/newsfragments/555.fixed.md
@@ -0,0 +1 @@
+Fix certificate name inconsistencies between setup docs and values file fragments.