diff --git a/app/src/main/cpp/PhoneDevice.cpp b/app/src/main/cpp/PhoneDevice.cpp
index bbf3b9de..23382e84 100644
--- a/app/src/main/cpp/PhoneDevice.cpp
+++ b/app/src/main/cpp/PhoneDevice.cpp
@@ -1465,7 +1465,10 @@ bool CPhoneDevice::ReleaseWakelock(uint64_t wakelock)
     }
     jstring jname = env->NewStringUTF(name.c_str());
 
-    env->CallVoidMethod(m_javaService, mReleaseWakelockMid, jname);
+    if (!env->IsSameObject(m_javaService, NULL))
+    {
+        env->CallVoidMethod(m_javaService, mReleaseWakelockMid, jname);
+    }
     env->DeleteLocalRef(jname);
     // env->ReleaseStringUTFChars(jname, name.c_str());
     if (didAttachThread)