diff --git a/libraries/AP_HAL_ChibiOS/UARTDriver.cpp b/libraries/AP_HAL_ChibiOS/UARTDriver.cpp
index 054cf90a2e..d33106715e 100644
--- a/libraries/AP_HAL_ChibiOS/UARTDriver.cpp
+++ b/libraries/AP_HAL_ChibiOS/UARTDriver.cpp
@@ -1740,7 +1740,7 @@ bool UARTDriver::set_options(uint16_t options)
 }
 
 // get optional features
-uint8_t UARTDriver::get_options(void) const
+uint16_t UARTDriver::get_options(void) const
 {
     return _last_options;
 }
diff --git a/libraries/AP_HAL_ChibiOS/UARTDriver.h b/libraries/AP_HAL_ChibiOS/UARTDriver.h
index 33ff9ce9c4..c296826ad0 100644
--- a/libraries/AP_HAL_ChibiOS/UARTDriver.h
+++ b/libraries/AP_HAL_ChibiOS/UARTDriver.h
@@ -69,7 +69,7 @@ public:
 
     // control optional features
     bool set_options(uint16_t options) override;
-    uint8_t get_options(void) const override;
+    uint16_t get_options(void) const override;
 
     // write to a locked port. If port is locked and key is not correct then 0 is returned
     // and write is discarded