diff --git a/Tools/AP_Periph/wscript b/Tools/AP_Periph/wscript
index a3b92b0150..826e976275 100644
--- a/Tools/AP_Periph/wscript
+++ b/Tools/AP_Periph/wscript
@@ -44,6 +44,7 @@ def build(bld):
                      'AP_FlashStorage',
                      'AP_RAMTRON',
                      'AP_GPS',
+                     'AP_GSOF',
                      'AP_Networking',
                      'AP_SerialManager',
                      'AP_RTC',