diff --git a/edxp-core/src/main/cpp/external/yahfa/src/HookMain.c b/edxp-core/src/main/cpp/external/yahfa/src/HookMain.c
index c712d3bf..f40b53de 100644
--- a/edxp-core/src/main/cpp/external/yahfa/src/HookMain.c
+++ b/edxp-core/src/main/cpp/external/yahfa/src/HookMain.c
@@ -319,6 +319,7 @@ jboolean Java_lab_galaxy_yahfa_HookMain_backupAndHookNative(JNIEnv *env, jclass
     )) {
         (*env)->NewGlobalRef(env,
                              hook); // keep a global ref so that the hook method would not be GCed
+        if (backup) (*env)->NewGlobalRef(env, backup);
         return JNI_TRUE;
     } else {
         return JNI_FALSE;