diff --git a/examples/platforms/nrf528xx/nrf52811/openthread-core-nrf52811-config.h b/examples/platforms/nrf528xx/nrf52811/openthread-core-nrf52811-config.h
index 6dc856cfd..47854e8a1 100644
--- a/examples/platforms/nrf528xx/nrf52811/openthread-core-nrf52811-config.h
+++ b/examples/platforms/nrf528xx/nrf52811/openthread-core-nrf52811-config.h
@@ -147,7 +147,7 @@
  *
  */
 #ifndef OPENTHREAD_CONFIG_MAC_SOFTWARE_TX_SECURITY_ENABLE
-#define OPENTHREAD_CONFIG_MAC_SOFTWARE_TX_SECURITY_ENABLE 0
+#define OPENTHREAD_CONFIG_MAC_SOFTWARE_TX_SECURITY_ENABLE (OPENTHREAD_CONFIG_THREAD_VERSION >= OT_THREAD_VERSION_1_2)
 #endif
 
 /**
diff --git a/examples/platforms/nrf528xx/nrf52833/openthread-core-nrf52833-config.h b/examples/platforms/nrf528xx/nrf52833/openthread-core-nrf52833-config.h
index 995b1da62..d61579d0b 100644
--- a/examples/platforms/nrf528xx/nrf52833/openthread-core-nrf52833-config.h
+++ b/examples/platforms/nrf528xx/nrf52833/openthread-core-nrf52833-config.h
@@ -169,7 +169,7 @@
  *
  */
 #ifndef OPENTHREAD_CONFIG_MAC_SOFTWARE_TX_SECURITY_ENABLE
-#define OPENTHREAD_CONFIG_MAC_SOFTWARE_TX_SECURITY_ENABLE 0
+#define OPENTHREAD_CONFIG_MAC_SOFTWARE_TX_SECURITY_ENABLE (OPENTHREAD_CONFIG_THREAD_VERSION >= OT_THREAD_VERSION_1_2)
 #endif
 
 /**
diff --git a/examples/platforms/nrf528xx/nrf52840/openthread-core-nrf52840-config.h b/examples/platforms/nrf528xx/nrf52840/openthread-core-nrf52840-config.h
index c70558a68..a41610ed4 100644
--- a/examples/platforms/nrf528xx/nrf52840/openthread-core-nrf52840-config.h
+++ b/examples/platforms/nrf528xx/nrf52840/openthread-core-nrf52840-config.h
@@ -169,7 +169,7 @@
  *
  */
 #ifndef OPENTHREAD_CONFIG_MAC_SOFTWARE_TX_SECURITY_ENABLE
-#define OPENTHREAD_CONFIG_MAC_SOFTWARE_TX_SECURITY_ENABLE 0
+#define OPENTHREAD_CONFIG_MAC_SOFTWARE_TX_SECURITY_ENABLE (OPENTHREAD_CONFIG_THREAD_VERSION >= OT_THREAD_VERSION_1_2)
 #endif
 
 /**
diff --git a/examples/platforms/simulation/openthread-core-simulation-config.h b/examples/platforms/simulation/openthread-core-simulation-config.h
index 2e3a776a1..9fd31aca5 100644
--- a/examples/platforms/simulation/openthread-core-simulation-config.h
+++ b/examples/platforms/simulation/openthread-core-simulation-config.h
@@ -115,7 +115,7 @@
  *
  */
 #ifndef OPENTHREAD_CONFIG_MAC_SOFTWARE_TX_SECURITY_ENABLE
-#define OPENTHREAD_CONFIG_MAC_SOFTWARE_TX_SECURITY_ENABLE 1
+#define OPENTHREAD_CONFIG_MAC_SOFTWARE_TX_SECURITY_ENABLE (OPENTHREAD_CONFIG_THREAD_VERSION >= OT_THREAD_VERSION_1_2)
 #endif
 #endif // OPENTHREAD_RADIO