diff --git a/IO.cpp b/IO.cpp
index fae1e9e..1f60ad5 100644
--- a/IO.cpp
+++ b/IO.cpp
@@ -227,7 +227,7 @@ void CIO::process()
     // Two seconds timeout
     if (m_watchdog >= 48000U) {
       if (m_modemState == STATE_DSTAR || m_modemState == STATE_DMR || m_modemState == STATE_YSF) {
-        if (m_modemState == STATE_DMR)
+        if (m_modemState == STATE_DMR && m_tx)
           dmrTX.setStart(false);
         m_modemState = STATE_IDLE;
       }