diff --git a/modules/images-configuration-parameters.adoc b/modules/images-configuration-parameters.adoc
index 2d2ea597ba..a73c791daf 100644
--- a/modules/images-configuration-parameters.adoc
+++ b/modules/images-configuration-parameters.adoc
@@ -34,7 +34,7 @@ should be trusted during `ImageStream import`, `pod image pull`,
 `openshift-image-registry pullthrough`, and builds.
 
 The namespace for this ConfigMap is `openshift-config`. The format of the
-ConfigMap is to use the registry hostname as the key, and the base64-encoded
+ConfigMap is to use the registry hostname as the key, and the PEM-encoded
 certificate as the value, for each additional registry CA to trust.
 
 `registrySources`: Contains configuration that determines how the container