diff --git a/test_monitor_tshark.sh b/test_monitor_tshark.sh
index 522f7ce..ad4dd52 100755
--- a/test_monitor_tshark.sh
+++ b/test_monitor_tshark.sh
@@ -136,8 +136,12 @@ echo "Capturing packets for $DURATION seconds..."
 # Also, wlan.ra/wlan.ta may not be available for all frame types, which can cause tshark to exit with code 1
 # We'll capture both stdout and stderr, but continue even if tshark exits with an error
 set +e  # Temporarily disable exit on error
-# Use -q to suppress packet count output, and continue even if some fields are missing
-CAPTURE_OUTPUT=$(timeout "$DURATION" tshark -q -i "$INTERFACE" -n -T fields \
+# Use -q to suppress packet count output
+# Use display filter to only capture frames that have RA/TA fields
+# This prevents tshark from erroring when it encounters frames without these fields
+CAPTURE_OUTPUT=$(timeout "$DURATION" tshark -q -i "$INTERFACE" -n \
+    -Y "(wlan.ra) || (wlan.ta)" \
+    -T fields \
     -e frame.number \
     -e frame.time \
     -e wlan.ra \