diff --git a/pkg/apis/controller/common/v1beta1/common_types.go b/pkg/apis/controller/common/v1beta1/common_types.go
index fba7620cb6b..cb2e2aa44b6 100644
--- a/pkg/apis/controller/common/v1beta1/common_types.go
+++ b/pkg/apis/controller/common/v1beta1/common_types.go
@@ -91,7 +91,7 @@ type Metric struct {
 
 // +k8s:deepcopy-gen=true
 type Observation struct {
-	// Key-value pairs for metric names and values
+	// Key-value pairs for metric names and values.
 	Metrics []Metric `json:"metrics"`
 }