diff --git a/service/s3/api_client.go b/service/s3/api_client.go
index e59172545a7..5e1c36672d1 100644
--- a/service/s3/api_client.go
+++ b/service/s3/api_client.go
@@ -97,10 +97,8 @@ func New(config aws.Config) *Client {
 		),
 	}
 
-	if config.AdditionalConfig != nil {
-		if err := config.AdditionalConfig.ResolveConfig(resolveClientConfig(svc)); err != nil {
-			panic(fmt.Errorf("failed to resolve service configuration: %v", err))
-		}
+	if err := resolveClientConfig(svc, config.ConfigSources); err != nil {
+		panic(fmt.Errorf("failed to resolve service configuration: %v", err))
 	}
 
 	// Handlers
diff --git a/service/s3/api_client_config.go b/service/s3/api_client_config.go
index 2289f8da64e..b59012fb7f2 100644
--- a/service/s3/api_client_config.go
+++ b/service/s3/api_client_config.go
@@ -6,14 +6,16 @@ import (
 	"github.com/aws/aws-sdk-go-v2/service/s3/internal/external"
 )
 
-func resolveClientConfig(svc *Client) func(configs []interface{}) error {
-	return func(configs []interface{}) error {
-		if value, ok, err := external.ResolveUseARNRegion(configs); err != nil {
-			return err
-		} else if ok {
-			svc.UseARNRegion = value
-		}
-
+func resolveClientConfig(svc *Client, configs []interface{}) error {
+	if len(configs) == 0 {
 		return nil
 	}
+
+	if value, ok, err := external.ResolveUseARNRegion(configs); err != nil {
+		return err
+	} else if ok {
+		svc.UseARNRegion = value
+	}
+
+	return nil
 }
diff --git a/service/s3/api_client_config_test.go b/service/s3/api_client_config_test.go
index bd263602db3..9a5b7c709b2 100644
--- a/service/s3/api_client_config_test.go
+++ b/service/s3/api_client_config_test.go
@@ -18,7 +18,7 @@ func TestExternalConfigResolver(t *testing.T) {
 	t.Run("UseARNRegion", func(t *testing.T) {
 		t.Run("value not found", func(t *testing.T) {
 			svc := &Client{}
-			err := resolveClientConfig(svc)([]interface{}{
+			err := resolveClientConfig(svc, []interface{}{
 				mockUseARNRegion(func() (value bool, ok bool, err error) {
 					return value, ok, err
 				}),
@@ -32,7 +32,7 @@ func TestExternalConfigResolver(t *testing.T) {
 		})
 		t.Run("resolve error", func(t *testing.T) {
 			svc := &Client{}
-			err := resolveClientConfig(svc)([]interface{}{
+			err := resolveClientConfig(svc, []interface{}{
 				mockUseARNRegion(func() (value bool, ok bool, err error) {
 					err = fmt.Errorf("resolve error")
 					return value, ok, err
@@ -47,7 +47,7 @@ func TestExternalConfigResolver(t *testing.T) {
 		})
 		t.Run("value found", func(t *testing.T) {
 			svc := &Client{}
-			err := resolveClientConfig(svc)([]interface{}{
+			err := resolveClientConfig(svc, []interface{}{
 				mockUseARNRegion(func() (value bool, ok bool, err error) {
 					value = true
 					return value, true, err