diff --git a/app/src/main/kotlin/com/tutpro/baresip/MainScreen.kt b/app/src/main/kotlin/com/tutpro/baresip/MainScreen.kt
index 91e20615..15aba3d0 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/MainScreen.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/MainScreen.kt
@@ -1997,6 +1997,7 @@ private fun showCall(ctx: Context, viewModel: ViewModel, ua: UserAgent?, showCal
         securityIcon.intValue = -1
         showHangupButton.value = false
         transferIcon.intValue = R.drawable.call_transfer
+        dtmfText.value = ""
         dtmfEnabled.value = false
         focusDtmf.value = false
         showCallButton.value = true