diff --git a/src/pkg/otelcolclient/otelcolclient.go b/src/pkg/otelcolclient/otelcolclient.go
index 6b95fce59..30e87ae96 100644
--- a/src/pkg/otelcolclient/otelcolclient.go
+++ b/src/pkg/otelcolclient/otelcolclient.go
@@ -173,7 +173,7 @@ func attributes(e *loggregator_v2.Envelope) []*commonpb.KeyValue {
 	}
 
 	for k, v := range e.Tags {
-		if k == "instance_id" || k == "source_id" {
+		if k == "instance_id" || k == "source_id" || k == "__v1_type" {
 			continue
 		}
 
diff --git a/src/pkg/otelcolclient/otelcolclient_test.go b/src/pkg/otelcolclient/otelcolclient_test.go
index 20a3e256d..2e0a3c9e6 100644
--- a/src/pkg/otelcolclient/otelcolclient_test.go
+++ b/src/pkg/otelcolclient/otelcolclient_test.go
@@ -255,6 +255,20 @@ var _ = Describe("Client", func() {
 					Expect(cmp.Diff(actualAtts, expectedAtts, protocmp.Transform(), sortFunc)).To(BeEmpty())
 				})
 			})
+
+			Context("when the envelope has been converted from a v1 representation", func() {
+				BeforeEach(func() {
+					envelope.Tags["__v1_type"] = "ValueMetric"
+				})
+
+				It("drops the __v1_type tag", func() {
+					var msr *colmetricspb.ExportMetricsServiceRequest
+					Expect(spyMSC.requests).To(Receive(&msr))
+
+					actualAtts := msr.GetResourceMetrics()[0].GetScopeMetrics()[0].GetMetrics()[0].GetGauge().GetDataPoints()[0].GetAttributes()
+					Expect(actualAtts).ToNot(ContainElement(HaveField("Key", "__v1_type")))
+				})
+			})
 		})
 
 		Context("when given a counter", func() {