diff --git a/libraries/AP_SerialManager/AP_SerialManager.cpp b/libraries/AP_SerialManager/AP_SerialManager.cpp
index d7416c1268..e5cfb004f4 100644
--- a/libraries/AP_SerialManager/AP_SerialManager.cpp
+++ b/libraries/AP_SerialManager/AP_SerialManager.cpp
@@ -684,7 +684,8 @@ void AP_SerialManager::set_options(uint16_t i)
 }
 
 // get the passthru ports if enabled
-bool AP_SerialManager::get_passthru(AP_HAL::UARTDriver *&port1, AP_HAL::UARTDriver *&port2, uint8_t &timeout_s) const
+bool AP_SerialManager::get_passthru(AP_HAL::UARTDriver *&port1, AP_HAL::UARTDriver *&port2, uint8_t &timeout_s,
+                                    uint32_t &baud1, uint32_t &baud2) const
 {
     if (passthru_port2 < 0 ||
         passthru_port2 >= SERIALMANAGER_NUM_PORTS ||
@@ -694,6 +695,8 @@ bool AP_SerialManager::get_passthru(AP_HAL::UARTDriver *&port1, AP_HAL::UARTDriv
     }
     port1 = state[passthru_port1].uart;
     port2 = state[passthru_port2].uart;
+    baud1 = map_baudrate(state[passthru_port1].baud);
+    baud2 = map_baudrate(state[passthru_port2].baud);
     timeout_s = MAX(passthru_timeout, 0);
     return true;
 }
diff --git a/libraries/AP_SerialManager/AP_SerialManager.h b/libraries/AP_SerialManager/AP_SerialManager.h
index 50cc1dd408..6cdb93c1a3 100644
--- a/libraries/AP_SerialManager/AP_SerialManager.h
+++ b/libraries/AP_SerialManager/AP_SerialManager.h
@@ -189,7 +189,8 @@ public:
     void set_blocking_writes_all(bool blocking);
 
     // get the passthru ports if enabled
-    bool get_passthru(AP_HAL::UARTDriver *&port1, AP_HAL::UARTDriver *&port2, uint8_t &timeout_s) const;
+    bool get_passthru(AP_HAL::UARTDriver *&port1, AP_HAL::UARTDriver *&port2, uint8_t &timeout_s,
+                      uint32_t &baud1, uint32_t &baud2) const;
 
     // disable passthru by settings SERIAL_PASS2 to -1
     void disable_passthru(void);