diff --git a/Defines.h b/Defines.h
index faaeb6f..eb0c9f3 100644
--- a/Defines.h
+++ b/Defines.h
@@ -20,10 +20,10 @@
 #define	Defines_H
 
 const unsigned char MODE_IDLE    = 0U;
-const unsigned char MODE_LOCKOUT = 1U;
-const unsigned char MODE_DSTAR   = 2U;
-const unsigned char MODE_DMR     = 3U;
-const unsigned char MODE_YSF     = 4U;
+const unsigned char MODE_DSTAR   = 1U;
+const unsigned char MODE_DMR     = 2U;
+const unsigned char MODE_YSF     = 3U;
+const unsigned char MODE_LOCKOUT = 99U;
 
 const unsigned char TAG_HEADER = 0x00U;
 const unsigned char TAG_DATA   = 0x01U;
diff --git a/MMDVMHost.cpp b/MMDVMHost.cpp
index 7806df3..1acb5c4 100644
--- a/MMDVMHost.cpp
+++ b/MMDVMHost.cpp
@@ -186,6 +186,12 @@ int CMMDVMHost::run()
 	setMode(MODE_IDLE);
 
 	while (!m_killed) {
+		bool lockout = m_modem->hasLockout();
+		if (lockout && m_mode != MODE_LOCKOUT)
+			setMode(MODE_LOCKOUT);
+		else if (!lockout && m_mode == MODE_LOCKOUT)
+			setMode(MODE_IDLE);
+
 		unsigned char data[200U];
 		unsigned int len;
 		bool ret;