diff --git a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D331RtcmMessageExecutor.java b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D331RtcmMessageExecutor.java
index fcccdfa0..8a9519e0 100644
--- a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D331RtcmMessageExecutor.java
+++ b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D331RtcmMessageExecutor.java
@@ -117,6 +117,7 @@ public class D331RtcmMessageExecutor implements Executor<D331RtcmMessage, Void>
             deviceBs.setLatitude(gga.getLatitude());
             deviceBs.setLongitude(gga.getLongitude());
             deviceBs.setAltitude(gga.getAltitude());
+            deviceBs.setGeoidSeparation(gga.getGeoidSeparation());
         }
         // update angles
         Tilt tilt = message.getTilt();