diff --git a/ios/Plugin/common/Serialization.swift b/ios/Plugin/common/Serialization.swift
index edee624..ecd3525 100644
--- a/ios/Plugin/common/Serialization.swift
+++ b/ios/Plugin/common/Serialization.swift
@@ -255,7 +255,10 @@ func serializeIsInsideGeofence(_ isInsideGeofence: Result<Bool, HyperTrack.Locat
     case let .success(success):
         return [
             keyType: typeSuccess,
-            keyValue: success,
+            keyValue: [
+                keyType: "isInsideGeofence",
+                keyValue: success,
+            ],
         ]
     case let .failure(failure):
         return [
diff --git a/src/HyperTrack.ts b/src/HyperTrack.ts
index d2c44bb..ee841f5 100644
--- a/src/HyperTrack.ts
+++ b/src/HyperTrack.ts
@@ -22,6 +22,7 @@ import type { OrderStatus } from './data_types/OrderStatus';
 import type { Order } from './data_types/Order';
 import type { OrdersInternal } from './data_types/internal/OrdersInternal';
 import type { OrderInternal } from './data_types/internal/OrderInternal';
+import { IsInsideGeofence } from './data_types/internal/IsInsideGeofence';
 
 export const EVENT_ERRORS = 'errors';
 export const EVENT_IS_AVAILABLE = 'isAvailable';
@@ -499,13 +500,17 @@ export default class HyperTrack {
 
   /** @ignore */
   private static deserializeIsInsideGeofence(
-    isInsideGeofence: Result<boolean, LocationErrorInternal>,
+    isInsideGeofence: Result<IsInsideGeofence, LocationErrorInternal>,
   ): Result<boolean, LocationError> {
     switch (isInsideGeofence.type) {
       case 'success':
+        let successValue = isInsideGeofence.value;
+        if (successValue.type !== 'isInsideGeofence') {
+          throw new Error(`Invalid isInsideGeofence: ${JSON.stringify(successValue)}`);
+        }
         return {
           type: 'success',
-          value: isInsideGeofence.value,
+          value: successValue.value,
         };
       case 'failure':
         return {
diff --git a/src/data_types/internal/IsInsideGeofence.ts b/src/data_types/internal/IsInsideGeofence.ts
new file mode 100644
index 0000000..90a2b34
--- /dev/null
+++ b/src/data_types/internal/IsInsideGeofence.ts
@@ -0,0 +1,4 @@
+export type IsInsideGeofence = {
+  type: 'isInsideGeofence';
+  value: boolean;
+};
diff --git a/src/data_types/internal/OrderInternal.ts b/src/data_types/internal/OrderInternal.ts
index fd9529e..c6b1fbf 100644
--- a/src/data_types/internal/OrderInternal.ts
+++ b/src/data_types/internal/OrderInternal.ts
@@ -1,8 +1,9 @@
 import { Result } from '../Result';
 import type { LocationErrorInternal } from './LocationErrorInternal';
+import type { IsInsideGeofence } from './IsInsideGeofence';
 
 export type OrderInternal = {
   orderHandle: string;
-  isInsideGeofence: Result<boolean, LocationErrorInternal>;
+  isInsideGeofence: Result<IsInsideGeofence, LocationErrorInternal>;
   index: number;
 };