diff --git a/main.cpp b/main.cpp
index c71963c..62b00e6 100644
--- a/main.cpp
+++ b/main.cpp
@@ -134,7 +134,7 @@ struct DataRxTx {
         framesToRecord = 0;
         framesLeftToRecord = 0;
         nBitsInMarker = 16;
-        nMarkerFrames = 8;
+        nMarkerFrames = 16;
         nPostMarkerFrames = 0;
         sendDataLength = (txMode == ::TxMode::FixedLength) ? ::kDefaultFixedLength : textLength + 3;