diff --git a/Transceiver52M/Transceiver.cpp b/Transceiver52M/Transceiver.cpp
index cb191d5..d4ca4b9 100644
--- a/Transceiver52M/Transceiver.cpp
+++ b/Transceiver52M/Transceiver.cpp
@@ -827,7 +827,7 @@
     // set TSC
     unsigned TSC;
     sscanf(buffer, "%3s %s %d", cmdcheck, command, &TSC);
-    if (mOn || (TSC < 0) || (TSC > 7))
+    if ((TSC < 0) || (TSC > 7))
       sprintf(response, "RSP SETTSC 1 %d", TSC);
     else if (chan && (TSC != mTSC))
       sprintf(response, "RSP SETTSC 1 %d", TSC);