diff --git a/Sources/Core/AWSClientRuntime/Auth/AuthSchemes/SigV4AuthScheme.swift b/Sources/Core/AWSClientRuntime/Auth/AuthSchemes/SigV4AuthScheme.swift
index 2b5cf0a081b..2e38bd963f8 100644
--- a/Sources/Core/AWSClientRuntime/Auth/AuthSchemes/SigV4AuthScheme.swift
+++ b/Sources/Core/AWSClientRuntime/Auth/AuthSchemes/SigV4AuthScheme.swift
@@ -11,4 +11,11 @@ public struct SigV4AuthScheme: ClientRuntime.AuthScheme {
     public let schemeID: String = "aws.auth#sigv4"
     public let signer: ClientRuntime.Signer = AWSSigV4Signer()
     public let idKind: ClientRuntime.IdentityKind = .aws
+
+    public func customizeSigningProperties(signingProperties: Attributes, context: HttpContext) -> Attributes {
+        var copy = signingProperties
+        copy.set(key: AttributeKeys.bidirectionalStreaming, value: context.isBidirectionalStreamingEnabled())
+        copy.set(key: AttributeKeys.signingRegion, value: context.getSigningRegion())
+        return copy
+    }
 }