diff --git a/app/src/main/jni/netguard/netguard.c b/app/src/main/jni/netguard/netguard.c
index fd483306..f7328dd7 100644
--- a/app/src/main/jni/netguard/netguard.c
+++ b/app/src/main/jni/netguard/netguard.c
@@ -57,15 +57,19 @@ jint JNI_OnLoad(JavaVM *vm, void *reserved) {
 
     const char *packet = "eu/faircode/netguard/Packet";
     clsPacket = jniGlobalRef(env, jniFindClass(env, packet));
+    ng_add_alloc(clsPacket, "clsPacket");
 
     const char *allowed = "eu/faircode/netguard/Allowed";
     clsAllowed = jniGlobalRef(env, jniFindClass(env, allowed));
+    ng_add_alloc(clsAllowed, "clsAllowed");
 
     const char *rr = "eu/faircode/netguard/ResourceRecord";
     clsRR = jniGlobalRef(env, jniFindClass(env, rr));
+    ng_add_alloc(clsRR, "clsRR");
 
     const char *usage = "eu/faircode/netguard/Usage";
     clsUsage = jniGlobalRef(env, jniFindClass(env, usage));
+    ng_add_alloc(clsUsage, "clsUsage");
 
     // Raise file number limit to maximum
     struct rlimit rlim;
@@ -91,7 +95,13 @@ void JNI_OnUnload(JavaVM *vm, void *reserved) {
         log_android(ANDROID_LOG_INFO, "JNI load GetEnv failed");
     else {
         (*env)->DeleteGlobalRef(env, clsPacket);
+        (*env)->DeleteGlobalRef(env, clsAllowed);
         (*env)->DeleteGlobalRef(env, clsRR);
+        (*env)->DeleteGlobalRef(env, clsUsage);
+        ng_delete_alloc(clsPacket, __FILE__, __LINE__);
+        ng_delete_alloc(clsAllowed, __FILE__, __LINE__);
+        ng_delete_alloc(clsRR, __FILE__, __LINE__);
+        ng_delete_alloc(clsUsage, __FILE__, __LINE__);
     }
 }