diff --git a/app/src/main/cpp/MicroPhoto.cpp b/app/src/main/cpp/MicroPhoto.cpp
index 7c717ca7..a7f1a29c 100644
--- a/app/src/main/cpp/MicroPhoto.cpp
+++ b/app/src/main/cpp/MicroPhoto.cpp
@@ -1424,7 +1424,7 @@ Java_com_xypower_mpapp_MicroPhotoService_releasePowerControl(
 
 extern "C"
 JNIEXPORT jint JNICALL
-Java_com_xypower_mpapp_MainActivity_getCustomAppId(JNIEnv *env, jobject thiz) {
+Java_com_xypower_mpapp_MicroPhotoService_getCustomAppId(JNIEnv *env, jobject thiz) {
 #ifdef USING_N938
     return 2;
 #elif defined(USING_PLZ)