diff --git a/Tools/autotest/ArduPlane_Tests/MicroStrainEAHRS/ap1.txt b/Tools/autotest/ArduPlane_Tests/MicroStrainEAHRS5/ap1.txt
similarity index 100%
rename from Tools/autotest/ArduPlane_Tests/MicroStrainEAHRS/ap1.txt
rename to Tools/autotest/ArduPlane_Tests/MicroStrainEAHRS5/ap1.txt
diff --git a/Tools/autotest/arduplane.py b/Tools/autotest/arduplane.py
index 05a415b841..9cbbb858d8 100644
--- a/Tools/autotest/arduplane.py
+++ b/Tools/autotest/arduplane.py
@@ -3082,9 +3082,9 @@ class AutoTestPlane(AutoTest):
         '''Test VectorNav EAHRS support'''
         self.fly_external_AHRS("VectorNav", 1, "ap1.txt")
 
-    def MicroStrainEAHRS(self):
-        '''Test MicroStrain EAHRS support'''
-        self.fly_external_AHRS("MicroStrain", 2, "ap1.txt")
+    def MicroStrainEAHRS5(self):
+        '''Test MicroStrain EAHRS series 5 support'''
+        self.fly_external_AHRS("MicroStrain5", 2, "ap1.txt")
 
     def get_accelvec(self, m):
         return Vector3(m.xacc, m.yacc, m.zacc) * 0.001 * 9.81
@@ -4725,7 +4725,7 @@ class AutoTestPlane(AutoTest):
             self.TerrainMission,
             self.TerrainLoiter,
             self.VectorNavEAHRS,
-            self.MicroStrainEAHRS,
+            self.MicroStrainEAHRS5,
             self.Deadreckoning,
             self.DeadreckoningNoAirSpeed,
             self.EKFlaneswitch,
diff --git a/Tools/scripts/build_options.py b/Tools/scripts/build_options.py
index 1ab62da3d8..254f65240a 100644
--- a/Tools/scripts/build_options.py
+++ b/Tools/scripts/build_options.py
@@ -31,7 +31,7 @@ BUILD_OPTIONS = [
     Feature('AHRS', 'EKF3', 'HAL_NAVEKF3_AVAILABLE', 'Enable EKF3', 1, None),
     Feature('AHRS', 'EKF2', 'HAL_NAVEKF2_AVAILABLE', 'Enable EKF2', 0, None),
     Feature('AHRS', 'AHRS_EXT', 'HAL_EXTERNAL_AHRS_ENABLED', 'Enable External AHRS', 0, None),
-    Feature('AHRS', 'AHRS_EXT_MICROSTRAIN', 'AP_EXTERNAL_AHRS_MICROSTRAIN_ENABLED', 'Enable MICROSTRAIN External AHRS', 0, "AHRS_EXT"),  # noqa: E501
+    Feature('AHRS', 'AHRS_EXT_MICROSTRAIN5', 'AP_EXTERNAL_AHRS_MICROSTRAIN5_ENABLED', 'Enable MICROSTRAIN 5-series External AHRS', 0, "AHRS_EXT"),  # noqa: E501
     Feature('AHRS', 'AHRS_EXT_VECTORNAV', 'AP_EXTERNAL_AHRS_VECTORNAV_ENABLED', 'Enable VectorNav External AHRS', 0, "AHRS_EXT"),  # noqa
     Feature('AHRS', 'TEMPCAL', 'HAL_INS_TEMPERATURE_CAL_ENABLE', 'Enable IMU Temperature Calibration', 0, None),
     Feature('AHRS', 'VISUALODOM', 'HAL_VISUALODOM_ENABLED', 'Enable Visual Odometry', 0, 'EKF3_EXTNAV'),