diff --git a/libraries/AP_InertialSensor/AP_InertialSensor.cpp b/libraries/AP_InertialSensor/AP_InertialSensor.cpp
index e33cce4d3e..8fba42905e 100644
--- a/libraries/AP_InertialSensor/AP_InertialSensor.cpp
+++ b/libraries/AP_InertialSensor/AP_InertialSensor.cpp
@@ -912,8 +912,8 @@ AP_InertialSensor::detect_backends(void)
 
     _backends_detected = true;
 
-#if defined(HAL_CHIBIOS_ARCH_CUBEBLACK)
-    // special case for CubeBlack, where the IMUs on the isolated
+#if defined(HAL_CHIBIOS_ARCH_CUBE)
+    // special case for Cubes, where the IMUs on the isolated
     // board could fail on some boards. If the user has INS_USE=1,
     // INS_USE2=1 and INS_USE3=0 then force INS_USE3 to 1. This is
     // done as users loading past parameter files may end up with