diff --git a/luci-app-openmptcprouter/root/bin/omr-tracebox-mptcp b/luci-app-openmptcprouter/root/bin/omr-tracebox-mptcp
index 38425de1f..3388c07db 100755
--- a/luci-app-openmptcprouter/root/bin/omr-tracebox-mptcp
+++ b/luci-app-openmptcprouter/root/bin/omr-tracebox-mptcp
@@ -1,7 +1,7 @@
 #!/bin/sh
 INTERFACE=$2
 if [ -z "$INTERFACE" ]; then
-	tracebox -m 30 -l "pkt = ip{dst=to} / tcp{dst=65101} / MPCAPABLE / MSS / WSCALE if string.find(tostring(tracebox(pkt)),'MPTCP') then print 'MPTCP enabled' else print 'MPTCP disabled' end" $1
+	tracebox -m 30 -l "pkt = ip{dst=to} / tcp{dst=65101} / MPCAPABLE / MSS / WSCALE if string.find(tostring(tracebox(pkt)),'-TCPOptionMPTCPCapable') then print 'MPTCP disabled' elseif string.find(tostring(tracebox(pkt)),'MPTCP') then print 'MPTCP enabled' end" $1
 else
-	tracebox -m 30 -l "pkt = ip{dst=to} / tcp{dst=65101} / MPCAPABLE / MSS / WSCALE if string.find(tostring(tracebox(pkt)),'MPTCP') then print 'MPTCP enabled' else print 'MPTCP disabled' end" -i $INTERFACE $1
+	tracebox -m 30 -l "pkt = ip{dst=to} / tcp{dst=65101} / MPCAPABLE / MSS / WSCALE if string.find(tostring(tracebox(pkt)),'-TCPOptionMPTCPCapable') then print 'MPTCP disabled' elseif string.find(tostring(tracebox(pkt)),'MPTCP') then print 'MPTCP enabled' end" -i $INTERFACE $1
 fi
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