diff --git a/appium/webdriver/common/appiumby.py b/appium/webdriver/common/appiumby.py
index b269bb0f..14526899 100644
--- a/appium/webdriver/common/appiumby.py
+++ b/appium/webdriver/common/appiumby.py
@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from typing import Literal
+
 from selenium.webdriver.common.by import By
 
 
@@ -32,3 +34,20 @@ class AppiumBy(By):
     FLUTTER_INTEGRATION_KEY = '-flutter key'
     FLUTTER_INTEGRATION_TEXT = '-flutter text'
     FLUTTER_INTEGRATION_TEXT_CONTAINING = '-flutter text containing'
+
+
+ByType = Literal[
+    '-ios predicate string',
+    '-ios class chain',
+    '-android uiautomator',
+    '-android viewtag',
+    '-android datamatcher',
+    '-android viewmatcher',
+    'accessibility id',
+    '-image',
+    '-custom',
+    '-flutter semantics label',
+    '-flutter type',
+    '-flutter key',
+    '-flutter text containing',
+]
diff --git a/appium/webdriver/extensions/flutter_integration/flutter_finder.py b/appium/webdriver/extensions/flutter_integration/flutter_finder.py
index 473976ba..2e5db4ec 100644
--- a/appium/webdriver/extensions/flutter_integration/flutter_finder.py
+++ b/appium/webdriver/extensions/flutter_integration/flutter_finder.py
@@ -15,13 +15,16 @@
 # specific language governing permissions and limitations
 # under the License.
 
-from typing import Tuple
+from typing import Tuple, Union
+
+from selenium.webdriver.common.by import ByType as SeleniumByType
 
 from appium.webdriver.common.appiumby import AppiumBy
+from appium.webdriver.common.appiumby import ByType as AppiumByType
 
 
 class FlutterFinder:
-    def __init__(self, using: str, value: str) -> None:
+    def __init__(self, using: Union[SeleniumByType, AppiumByType], value: str) -> None:
         self.using = using
         self.value = value