diff --git a/pkg/controller/alerting/util.go b/pkg/controller/alerting/util.go
index 55fb6c686..99f94de0e 100644
--- a/pkg/controller/alerting/util.go
+++ b/pkg/controller/alerting/util.go
@@ -196,6 +196,9 @@ func makePrometheusRuleGroups(log logr.Logger, groupList client.ObjectList,
 					prules = append(prules, *prule)
 				}
 			}
+			if len(prules) == 0 {
+				continue
+			}
 			rulegroups = append(rulegroups, &promresourcesv1.RuleGroup{
 				Name:                    group.Name,
 				Interval:                group.Spec.Interval,
@@ -216,6 +219,9 @@ func makePrometheusRuleGroups(log logr.Logger, groupList client.ObjectList,
 					prules = append(prules, *prule)
 				}
 			}
+			if len(prules) == 0 {
+				continue
+			}
 			rulegroups = append(rulegroups, &promresourcesv1.RuleGroup{
 				Name:                    group.Name,
 				Interval:                group.Spec.Interval,
@@ -238,6 +244,9 @@ func makePrometheusRuleGroups(log logr.Logger, groupList client.ObjectList,
 					prules = append(prules, *prule)
 				}
 			}
+			if len(prules) == 0 {
+				continue
+			}
 			rulegroups = append(rulegroups, &promresourcesv1.RuleGroup{
 				Name:                    group.Name,
 				Interval:                group.Spec.Interval,