diff --git a/conf/airframes/test_hb.xml b/conf/airframes/test_hb.xml
index ec26252172..4d8b1c6795 100644
--- a/conf/airframes/test_hb.xml
+++ b/conf/airframes/test_hb.xml
@@ -16,7 +16,7 @@
     <subsystem name="attitude" 		type="dcm"/>
 
     <!-- Sensors -->
-    <!-- <subsystem name="imu" type="hb"/> does not exist yet-->
+    <subsystem name="imu" type="hb"/>
     <subsystem name="gps" 		    type="ublox_lea5h"/>
 
     <subsystem name="navigation"/>
diff --git a/conf/boards/hb_1.1.makefile b/conf/boards/hb_1.1.makefile
index 88a5accd29..b8d0c3ae0a 100644
--- a/conf/boards/hb_1.1.makefile
+++ b/conf/boards/hb_1.1.makefile
@@ -36,6 +36,7 @@ ifndef GPS_BAUD
 GPS_BAUD = B38400
 endif
 
+GPS_LED     = 2
 
 ifndef ADC_IR1
 ADC_IR1      = 1
@@ -53,3 +54,4 @@ ifndef ADC_IR_NB_SAMPLES
 ADC_IR_NB_SAMPLES = 16
 endif
 
+$(TARGET).ARCHDIR = $(ARCH)