diff --git a/runtime/runtime-core/api/runtime-core.api b/runtime/runtime-core/api/runtime-core.api
index 693082f70..ad78caa7d 100644
--- a/runtime/runtime-core/api/runtime-core.api
+++ b/runtime/runtime-core/api/runtime-core.api
@@ -94,6 +94,7 @@ public final class aws/smithy/kotlin/runtime/businessmetrics/SmithyBusinessMetri
 	public static final field ACCOUNT_ID_BASED_ENDPOINT Laws/smithy/kotlin/runtime/businessmetrics/SmithyBusinessMetric;
 	public static final field GZIP_REQUEST_COMPRESSION Laws/smithy/kotlin/runtime/businessmetrics/SmithyBusinessMetric;
 	public static final field PAGINATOR Laws/smithy/kotlin/runtime/businessmetrics/SmithyBusinessMetric;
+	public static final field PROTOCOL_RPC_V2_CBOR Laws/smithy/kotlin/runtime/businessmetrics/SmithyBusinessMetric;
 	public static final field RETRY_MODE_ADAPTIVE Laws/smithy/kotlin/runtime/businessmetrics/SmithyBusinessMetric;
 	public static final field RETRY_MODE_STANDARD Laws/smithy/kotlin/runtime/businessmetrics/SmithyBusinessMetric;
 	public static final field SERVICE_ENDPOINT_OVERRIDE Laws/smithy/kotlin/runtime/businessmetrics/SmithyBusinessMetric;
diff --git a/runtime/runtime-core/common/src/aws/smithy/kotlin/runtime/businessmetrics/BusinessMetricsUtils.kt b/runtime/runtime-core/common/src/aws/smithy/kotlin/runtime/businessmetrics/BusinessMetricsUtils.kt
index c739c0c3f..3a3571407 100644
--- a/runtime/runtime-core/common/src/aws/smithy/kotlin/runtime/businessmetrics/BusinessMetricsUtils.kt
+++ b/runtime/runtime-core/common/src/aws/smithy/kotlin/runtime/businessmetrics/BusinessMetricsUtils.kt
@@ -73,7 +73,8 @@ public enum class SmithyBusinessMetric(public override val identifier: String) :
     RETRY_MODE_STANDARD("E"),
     RETRY_MODE_ADAPTIVE("F"),
     GZIP_REQUEST_COMPRESSION("L"),
+    PROTOCOL_RPC_V2_CBOR("M"),
     SERVICE_ENDPOINT_OVERRIDE("N"),
-    SIGV4A_SIGNING("M"),
     ACCOUNT_ID_BASED_ENDPOINT("O"),
+    SIGV4A_SIGNING("P"),
 }