diff --git a/libraries/AP_Arming/AP_Arming.cpp b/libraries/AP_Arming/AP_Arming.cpp
index 83deb3aba3..5eae0afc39 100644
--- a/libraries/AP_Arming/AP_Arming.cpp
+++ b/libraries/AP_Arming/AP_Arming.cpp
@@ -1539,6 +1539,8 @@ bool AP_Arming::arm(AP_Arming::Method method, const bool do_arming_checks)
     if ((!do_arming_checks && mandatory_checks(true)) || (pre_arm_checks(true) && arm_checks(method))) {
         armed = true;
 
+        _last_arm_method = method;
+
         Log_Write_Arm(!do_arming_checks, method); // note Log_Write_Armed takes forced not do_arming_checks
 
     } else {
diff --git a/libraries/AP_Arming/AP_Arming.h b/libraries/AP_Arming/AP_Arming.h
index 2313a10a86..0acda955cb 100644
--- a/libraries/AP_Arming/AP_Arming.h
+++ b/libraries/AP_Arming/AP_Arming.h
@@ -124,6 +124,10 @@ public:
     // vehicle has been disarmed at least once.
     Method last_disarm_method() const { return _last_disarm_method; }
 
+    // method that was last used for arm; invalid unless the
+    // vehicle has been disarmed at least once.
+    Method last_arm_method() const { return _last_arm_method; }
+    
     // enum for ARMING_OPTIONS parameter
     enum class Option : int32_t {
         DISABLE_PREARM_DISPLAY   = (1U << 0),
@@ -264,9 +268,10 @@ private:
     bool aux_auth_error;        // true if too many auxiliary authorisers
     HAL_Semaphore aux_auth_sem; // semaphore for accessing the aux_auth_state and aux_auth_fail_msg
 
-    // method that was last used for disarm; invalid unless the
+    // method that was last used for arm/disarm; invalid unless the
     // vehicle has been disarmed at least once.
     Method _last_disarm_method = Method::UNKNOWN;
+    Method _last_arm_method = Method::UNKNOWN;
 
     uint32_t last_prearm_display_ms;  // last time we send statustexts for prearm failures
     bool running_arming_checks;  // true if the arming checks currently being performed are being done because the vehicle is trying to arm the vehicle