diff --git a/internal/service/iot/indexing_configuration.go b/internal/service/iot/indexing_configuration.go
index 43478952ad4..5bc1deb684c 100644
--- a/internal/service/iot/indexing_configuration.go
+++ b/internal/service/iot/indexing_configuration.go
@@ -121,7 +121,6 @@ func ResourceIndexingConfiguration() *schema.Resource {
 									"named_shadow_names": {
 										Type:     schema.TypeSet,
 										Optional: true,
-										Computed: true,
 										MinItems: 1,
 										Elem: &schema.Schema{
 											Type: schema.TypeString,
@@ -283,7 +282,7 @@ func flattenThingIndexingConfiguration(apiObject *iot.ThingIndexingConfiguration
 	}
 
 	if v := apiObject.Filter; v != nil {
-		tfMap["filter"] = flattenIndexingFilter(v)
+		tfMap["filter"] = []interface{}{flattenIndexingFilter(v)}
 	}
 
 	return tfMap
diff --git a/internal/service/iot/indexing_configuration_test.go b/internal/service/iot/indexing_configuration_test.go
index f4ec35792bb..a4131d55088 100644
--- a/internal/service/iot/indexing_configuration_test.go
+++ b/internal/service/iot/indexing_configuration_test.go
@@ -93,8 +93,8 @@ func testAccIndexingConfiguration_allAttributes(t *testing.T) {
 					resource.TestCheckResourceAttr(resourceName, "thing_indexing_configuration.0.named_shadow_indexing_mode", "ON"),
 					resource.TestCheckResourceAttr(resourceName, "thing_indexing_configuration.0.thing_connectivity_indexing_mode", "STATUS"),
 					resource.TestCheckResourceAttr(resourceName, "thing_indexing_configuration.0.thing_indexing_mode", "REGISTRY_AND_SHADOW"),
-					resource.TestCheckResourceAttr(resourceName, "thing_indexing_configuration.0.filter.named_shadow_names.#", "1"),
-					resource.TestCheckResourceAttr(resourceName, "thing_indexing_configuration.0.filter.named_shadow_names.0", "thing1shadow"),
+					resource.TestCheckResourceAttr(resourceName, "thing_indexing_configuration.0.filter.0.named_shadow_names.#", "1"),
+					resource.TestCheckResourceAttr(resourceName, "thing_indexing_configuration.0.filter.0.named_shadow_names.0", "thing1shadow"),
 				),
 			},
 			{