diff --git a/src/OpenTelemetry.Instrumentation.AspNetCore/CHANGELOG.md b/src/OpenTelemetry.Instrumentation.AspNetCore/CHANGELOG.md
index f4a4ac365a6..6e50bf60f8e 100644
--- a/src/OpenTelemetry.Instrumentation.AspNetCore/CHANGELOG.md
+++ b/src/OpenTelemetry.Instrumentation.AspNetCore/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+* Metrics instrumentation to correctly populate 'http.flavor' tag.
+  (1.1 instead of HTTP/1.1 etc.)
+  ([3379](https://github.com/open-telemetry/opentelemetry-dotnet/pull/3379))
+
 * Tracing instrumentation to populate 'http.flavor' tag.
   ([3372](https://github.com/open-telemetry/opentelemetry-dotnet/pull/3372))
 
diff --git a/src/OpenTelemetry.Instrumentation.AspNetCore/Implementation/HttpInMetricsListener.cs b/src/OpenTelemetry.Instrumentation.AspNetCore/Implementation/HttpInMetricsListener.cs
index 2becf9cf128..6d99477051f 100644
--- a/src/OpenTelemetry.Instrumentation.AspNetCore/Implementation/HttpInMetricsListener.cs
+++ b/src/OpenTelemetry.Instrumentation.AspNetCore/Implementation/HttpInMetricsListener.cs
@@ -78,7 +78,7 @@ public override void OnStopActivity(Activity activity, object payload)
             {
                 tags = new TagList
                 {
-                    { SemanticConventions.AttributeHttpFlavor, context.Request.Protocol },
+                    { SemanticConventions.AttributeHttpFlavor, HttpTagHelper.GetFlavorTagValueFromProtocol(context.Request.Protocol) },
                     { SemanticConventions.AttributeHttpScheme, context.Request.Scheme },
                     { SemanticConventions.AttributeHttpMethod, context.Request.Method },
                     { SemanticConventions.AttributeHttpHost, host },
@@ -90,7 +90,7 @@ public override void OnStopActivity(Activity activity, object payload)
             {
                 tags = new TagList
                 {
-                    { SemanticConventions.AttributeHttpFlavor, context.Request.Protocol },
+                    { SemanticConventions.AttributeHttpFlavor, HttpTagHelper.GetFlavorTagValueFromProtocol(context.Request.Protocol) },
                     { SemanticConventions.AttributeHttpScheme, context.Request.Scheme },
                     { SemanticConventions.AttributeHttpMethod, context.Request.Method },
                     { SemanticConventions.AttributeHttpHost, host },
diff --git a/test/OpenTelemetry.Instrumentation.AspNetCore.Tests/MetricTests.cs b/test/OpenTelemetry.Instrumentation.AspNetCore.Tests/MetricTests.cs
index 92512230663..53bac48facc 100644
--- a/test/OpenTelemetry.Instrumentation.AspNetCore.Tests/MetricTests.cs
+++ b/test/OpenTelemetry.Instrumentation.AspNetCore.Tests/MetricTests.cs
@@ -117,7 +117,7 @@ public async Task RequestMetricIsCaptured()
             var method = new KeyValuePair<string, object>(SemanticConventions.AttributeHttpMethod, "GET");
             var scheme = new KeyValuePair<string, object>(SemanticConventions.AttributeHttpScheme, "http");
             var statusCode = new KeyValuePair<string, object>(SemanticConventions.AttributeHttpStatusCode, "200");
-            var flavor = new KeyValuePair<string, object>(SemanticConventions.AttributeHttpFlavor, "HTTP/1.1");
+            var flavor = new KeyValuePair<string, object>(SemanticConventions.AttributeHttpFlavor, "1.1");
             var host = new KeyValuePair<string, object>(SemanticConventions.AttributeHttpHost, "localhost");
             var target = new KeyValuePair<string, object>(SemanticConventions.AttributeHttpTarget, "api/Values");
             Assert.Contains(method, attributes);