diff --git a/pkg/canary/deployment_controller.go b/pkg/canary/deployment_controller.go
index e6e990f0..d0e1bd1a 100644
--- a/pkg/canary/deployment_controller.go
+++ b/pkg/canary/deployment_controller.go
@@ -489,6 +489,11 @@ func (c *DeploymentController) appendPrimarySuffixToValuesIfNeeded(labelSelector
 				}
 			}
 		}
+		for key, value := range labelSelector.MatchLabels {
+			if contains(c.labels, key) {
+				labelSelector.MatchLabels[key] = value + "-primary"
+			}
+		}
 	}
 }