diff --git a/pkg/kn/commands/source/human_readable_flags.go b/pkg/kn/commands/source/human_readable_flags.go
index ba85125a19..2357c88d17 100644
--- a/pkg/kn/commands/source/human_readable_flags.go
+++ b/pkg/kn/commands/source/human_readable_flags.go
@@ -30,6 +30,7 @@ var sourceTypeDescription = map[string]string{
 	"ApiServerSource": "Watch and send Kubernetes API events to a sink",
 	"SinkBinding":     "Binding for connecting a PodSpecable to a sink",
 	"PingSource":      "Send periodically ping events to a sink",
+	"ContainerSource": "Generate events by Container image and send to a sink",
 }
 
 // ListTypesHandlers handles printing human readable table for `kn source list-types`