diff --git a/core/LocAdapterBase.cpp b/core/LocAdapterBase.cpp
index 27132b79..aca59093 100644
--- a/core/LocAdapterBase.cpp
+++ b/core/LocAdapterBase.cpp
@@ -149,7 +149,7 @@ bool LocAdapterBase::
 DEFAULT_IMPL(false)
 
 bool LocAdapterBase::
-    requestNiNotifyEvent(GnssNiNotification &notify, const void* data)
+    requestNiNotifyEvent(const GnssNiNotification &notify, const void* data)
 DEFAULT_IMPL(false)
 
 void LocAdapterBase::
diff --git a/core/LocAdapterBase.h b/core/LocAdapterBase.h
index 824a3407..5c471fd5 100644
--- a/core/LocAdapterBase.h
+++ b/core/LocAdapterBase.h
@@ -147,7 +147,7 @@ public:
     virtual bool requestSuplES(int connHandle);
     virtual bool reportDataCallOpened();
     virtual bool reportDataCallClosed();
-    virtual bool requestNiNotifyEvent(GnssNiNotification &notify, const void* data);
+    virtual bool requestNiNotifyEvent(const GnssNiNotification &notify, const void* data);
     inline virtual bool isInSession() { return false; }
     ContextBase* getContext() const { return mContext; }
     virtual void reportGnssMeasurementDataEvent(const GnssMeasurementsNotification& measurementsNotify);