diff --git a/libraries/AP_HAL_Linux/hwdef/bbbmini/hwdef.dat b/libraries/AP_HAL_Linux/hwdef/bbbmini/hwdef.dat
index 64773b336e..c9ec293786 100644
--- a/libraries/AP_HAL_Linux/hwdef/bbbmini/hwdef.dat
+++ b/libraries/AP_HAL_Linux/hwdef/bbbmini/hwdef.dat
@@ -28,3 +28,5 @@ define HAL_BATT_VOLT_PIN                  0
 define HAL_BATT_CURR_PIN                  1
 define HAL_BATT_VOLT_SCALE                10.1f
 define HAL_BATT_CURR_SCALE                17.0f
+
+define AP_RANGEFINDER_BBB_PRU_ENABLED AP_RANGEFINDER_BACKEND_DEFAULT_ENABLED
diff --git a/libraries/AP_HAL_Linux/hwdef/bebop/hwdef.dat b/libraries/AP_HAL_Linux/hwdef/bebop/hwdef.dat
index 34ed6b1a6c..6223e793a5 100644
--- a/libraries/AP_HAL_Linux/hwdef/bebop/hwdef.dat
+++ b/libraries/AP_HAL_Linux/hwdef/bebop/hwdef.dat
@@ -50,3 +50,5 @@ define HAL_BATT_MONITOR_DEFAULT AP_BattMonitor::Type::BEBOP
 LINUX_SPIDEV "bebop" 1   0      SPI_MODE_0 8   SPI_CS_KERNEL  320*KHZ 320*KHZ
 
 define HAL_LINUX_GPIO_BEBOP_ENABLED 1
+
+define AP_RANGEFINDER_BEBOP_ENABLED AP_RANGEFINDER_BACKEND_DEFAULT_ENABLED && defined(HAVE_LIBIIO)
diff --git a/libraries/AP_HAL_Linux/hwdef/disco/hwdef.dat b/libraries/AP_HAL_Linux/hwdef/disco/hwdef.dat
index 0c1683e008..5432646b4c 100644
--- a/libraries/AP_HAL_Linux/hwdef/disco/hwdef.dat
+++ b/libraries/AP_HAL_Linux/hwdef/disco/hwdef.dat
@@ -55,3 +55,5 @@ define AP_NOTIFY_DISCO_LED_ENABLED 1
 LINUX_SPIDEV "bebop" 1   0      SPI_MODE_0 8   SPI_CS_KERNEL  320*KHZ 320*KHZ
 
 define HAL_LINUX_GPIO_AERO_ENABLED 1
+
+define AP_RANGEFINDER_BEBOP_ENABLED AP_RANGEFINDER_BACKEND_DEFAULT_ENABLED && defined(HAVE_LIBIIO)