diff --git a/flight/OpenPilot/Makefile.win32 b/flight/OpenPilot/Makefile.win32
index fbfa226c5..df42fbdef 100644
--- a/flight/OpenPilot/Makefile.win32
+++ b/flight/OpenPilot/Makefile.win32
@@ -159,6 +159,7 @@ SRC += $(OPUAVOBJ)/velocitydesired.c
 SRC += $(OPUAVOBJ)/velocityactual.c
 SRC += $(OPUAVOBJ)/guidancesettings.c
 SRC += $(OPUAVOBJ)/firmwareiapobj.c
+SRC += $(OPUAVOBJ)/ratedesired.c
 endif
 
 ## PIOS Hardware (win32)