diff --git a/systemtest/approvals/TestServiceMetricsAggregation.approved.json b/systemtest/approvals/TestServiceMetricsAggregation.approved.json
index 3dc6986d014..b8298eef661 100644
--- a/systemtest/approvals/TestServiceMetricsAggregation.approved.json
+++ b/systemtest/approvals/TestServiceMetricsAggregation.approved.json
@@ -2,6 +2,7 @@
     "events": [
         {
             "@timestamp": "2006-01-02T15:04:05.000Z",
+            "_doc_count": 2,
             "agent": {
                 "name": "go"
             },
@@ -41,6 +42,7 @@
         },
         {
             "@timestamp": "2006-01-02T15:04:05.000Z",
+            "_doc_count": 2,
             "agent": {
                 "name": "go"
             },
diff --git a/x-pack/apm-server/aggregation/servicemetrics/aggregator.go b/x-pack/apm-server/aggregation/servicemetrics/aggregator.go
index bb4edcea4e4..08028776218 100644
--- a/x-pack/apm-server/aggregation/servicemetrics/aggregator.go
+++ b/x-pack/apm-server/aggregation/servicemetrics/aggregator.go
@@ -286,6 +286,7 @@ func makeServiceMetrics(event *model.APMEvent) serviceMetrics {
 }
 
 func makeMetricset(key aggregationKey, metrics serviceMetrics) model.APMEvent {
+	metricCount := int64(math.Round(metrics.transactionCount))
 	return model.APMEvent{
 		Timestamp: key.timestamp,
 		Service: model.Service{
@@ -297,14 +298,15 @@ func makeMetricset(key aggregationKey, metrics serviceMetrics) model.APMEvent {
 		},
 		Processor: model.MetricsetProcessor,
 		Metricset: &model.Metricset{
-			Name: metricsetName,
+			DocCount: metricCount,
+			Name:     metricsetName,
 		},
 		Transaction: &model.Transaction{
 			Type:         key.transactionType,
 			FailureCount: int(math.Round(metrics.failureCount)),
 			SuccessCount: int(math.Round(metrics.successCount)),
 			DurationSummary: model.SummaryMetric{
-				Count: int64(math.Round(metrics.transactionCount)),
+				Count: metricCount,
 				Sum:   float64(time.Duration(math.Round(metrics.transactionDuration)).Microseconds()),
 			},
 		},
diff --git a/x-pack/apm-server/aggregation/servicemetrics/aggregator_test.go b/x-pack/apm-server/aggregation/servicemetrics/aggregator_test.go
index 6325df8d164..81b75b6f5c6 100644
--- a/x-pack/apm-server/aggregation/servicemetrics/aggregator_test.go
+++ b/x-pack/apm-server/aggregation/servicemetrics/aggregator_test.go
@@ -111,7 +111,7 @@ func TestAggregatorRun(t *testing.T) {
 	metricsets := batchMetricsets(t, batch)
 	expected := []model.APMEvent{{
 		Processor: model.MetricsetProcessor,
-		Metricset: &model.Metricset{Name: "service"},
+		Metricset: &model.Metricset{Name: "service", DocCount: 6},
 		Service:   model.Service{Name: "backend"},
 		Agent:     model.Agent{Name: "java"},
 		Transaction: &model.Transaction{
@@ -125,7 +125,7 @@ func TestAggregatorRun(t *testing.T) {
 		},
 	}, {
 		Processor: model.MetricsetProcessor,
-		Metricset: &model.Metricset{Name: "service"},
+		Metricset: &model.Metricset{Name: "service", DocCount: 1},
 		Service:   model.Service{Name: "backend"},
 		Agent:     model.Agent{Name: "go"},
 		Transaction: &model.Transaction{
@@ -137,7 +137,7 @@ func TestAggregatorRun(t *testing.T) {
 		},
 	}, {
 		Processor: model.MetricsetProcessor,
-		Metricset: &model.Metricset{Name: "service"},
+		Metricset: &model.Metricset{Name: "service", DocCount: 1},
 		Service:   model.Service{Name: "backend"},
 		Agent:     model.Agent{Name: "go"},
 		Transaction: &model.Transaction{
@@ -149,7 +149,7 @@ func TestAggregatorRun(t *testing.T) {
 		},
 	}, {
 		Processor: model.MetricsetProcessor,
-		Metricset: &model.Metricset{Name: "service"},
+		Metricset: &model.Metricset{Name: "service", DocCount: 1},
 		Service:   model.Service{Name: "frontend"},
 		Agent:     model.Agent{Name: "rum-js"},
 		Transaction: &model.Transaction{
@@ -161,7 +161,7 @@ func TestAggregatorRun(t *testing.T) {
 		},
 	}, {
 		Processor: model.MetricsetProcessor,
-		Metricset: &model.Metricset{Name: "service"},
+		Metricset: &model.Metricset{Name: "service", DocCount: 1},
 		Service:   model.Service{Name: "frontend", Environment: "staging"},
 		Agent:     model.Agent{Name: "rum-js"},
 		Transaction: &model.Transaction{
@@ -281,7 +281,7 @@ func TestAggregatorMaxGroups(t *testing.T) {
 				},
 				SuccessCount: 1,
 			},
-			Metricset: &model.Metricset{Name: "service"},
+			Metricset: &model.Metricset{Name: "service", DocCount: 1},
 		}, m)
 	}
 }