diff --git a/src/input/input_tssrt.cpp b/src/input/input_tssrt.cpp
index 2edc3afa..19c40687 100644
--- a/src/input/input_tssrt.cpp
+++ b/src/input/input_tssrt.cpp
@@ -248,6 +248,7 @@ namespace Mist{
         adjustTime = thisPacket.getTime() + timeStampOffset;
       }
     }
+    if (!lastTimeStamp){meta.setBootMsOffset(Util::bootMS() - adjustTime);}
     lastTimeStamp = adjustTime;
     thisPacket.setTime(adjustTime);
   }