diff --git a/memtrack/1.0/default/Memtrack.h b/memtrack/1.0/default/Memtrack.h
index a3c55e4..0adba76 100644
--- a/memtrack/1.0/default/Memtrack.h
+++ b/memtrack/1.0/default/Memtrack.h
@@ -38,12 +38,12 @@
 using ::android::sp;
 
 struct Memtrack : public IMemtrack {
-    Memtrack(memtrack_module_t* module);
+    Memtrack(const memtrack_module_t* module);
     ~Memtrack();
     Return<void> getMemory(int32_t pid, MemtrackType type, getMemory_cb _hidl_cb)  override;
 
   private:
-    memtrack_module_t* mModule;
+    const memtrack_module_t* mModule;
 };
 
 extern "C" IMemtrack* HIDL_FETCH_IMemtrack(const char* name);