diff --git a/gnss/2.0/default/GnssMeasurement.h b/gnss/2.0/default/GnssMeasurement.h
index 151456c..73eaa13 100644
--- a/gnss/2.0/default/GnssMeasurement.h
+++ b/gnss/2.0/default/GnssMeasurement.h
@@ -63,9 +63,11 @@
 
     // Guarded by mMutex
     static sp<IGnssMeasurementCallback> sCallback;
+
     std::atomic<long> mMinIntervalMillis;
     std::atomic<bool> mIsActive;
     std::thread mThread;
+
     // Synchronization lock for sCallback
     mutable std::mutex mMutex;
 };
diff --git a/gnss/2.1/default/GnssAntennaInfo.h b/gnss/2.1/default/GnssAntennaInfo.h
index c512e4e..f2ce9a8 100644
--- a/gnss/2.1/default/GnssAntennaInfo.h
+++ b/gnss/2.1/default/GnssAntennaInfo.h
@@ -49,9 +49,11 @@
 
     // Guarded by mMutex
     static sp<IGnssAntennaInfoCallback> sCallback;
+
     std::atomic<long> mMinIntervalMillis;
     std::atomic<bool> mIsActive;
     std::thread mThread;
+
     // Synchronization lock for sCallback
     mutable std::mutex mMutex;
 };
diff --git a/gnss/2.1/default/GnssMeasurement.h b/gnss/2.1/default/GnssMeasurement.h
index 410876d..d446419 100644
--- a/gnss/2.1/default/GnssMeasurement.h
+++ b/gnss/2.1/default/GnssMeasurement.h
@@ -68,11 +68,14 @@
 
     // Guarded by mMutex
     static sp<V2_1::IGnssMeasurementCallback> sCallback_2_1;
+
     // Guarded by mMutex
     static sp<V2_0::IGnssMeasurementCallback> sCallback_2_0;
+
     std::atomic<long> mMinIntervalMillis;
     std::atomic<bool> mIsActive;
     std::thread mThread;
+
     // Synchronization lock for sCallback_2_1 and sCallback_2_0
     mutable std::mutex mMutex;
 };