diff --git a/Assets/Plugins/iOS/FirebaseSDKWrapper.mm b/Assets/Plugins/iOS/FirebaseSDKWrapper.mm
index dad920084..44d6751a3 100644
--- a/Assets/Plugins/iOS/FirebaseSDKWrapper.mm
+++ b/Assets/Plugins/iOS/FirebaseSDKWrapper.mm
@@ -1,6 +1,7 @@
 #import <Foundation/Foundation.h>
 
 #import "FirebaseSDK.h"
+#import "FirebaseMessaging/FIRMessaging.h"
 #import "NativeUtils.h"
 
 #ifdef __cplusplus
@@ -8,7 +9,7 @@ extern "C" {
 #endif
 
     typedef void (*GetFirebaseTokenCallback)(const char* token);
-    @property (nonatomic) GetFirebaseTokenCallback firebaseTokenCallback;
+    GetFirebaseTokenCallback firebaseTokenCallback;
 
     // 初始化SDK
     void FIRInitialize() {
@@ -30,15 +31,15 @@ extern "C" {
     }
 
     void FIRGetToken(GetFirebaseTokenCallback callback) {
-        self.firebaseTokenCallback = callback;
+        firebaseTokenCallback = callback;
         [[FIRMessaging messaging] tokenWithCompletion:^(NSString *token, NSError *error) {
             if (error != nil) {
                 NSLog(@"Error getting FCM registration token: %@", error);
             } else {
                 NSLog(@"FCM registration token: %@", token);
-                if (self.firebaseTokenCallback){
+                if (firebaseTokenCallback){
                     const char *pConstToken = [token UTF8String];
-                    self.firebaseTokenCallback(pConstToken);
+                    firebaseTokenCallback(pConstToken);
                 }
             }
         }];