diff --git a/Makefile b/Makefile
index 7fe136b31..43264db07 100644
--- a/Makefile
+++ b/Makefile
@@ -382,5 +382,5 @@ sim_posix_%: uavobjects_flight
 sim_win32: sim_win32_exe
 
 sim_win32_%: uavobjects_flight
-	$(V1) mkdir -p $(BUILD_DIR)/flight/sitl_win32
+	$(V1) mkdir -p $(BUILD_DIR)/sitl_win32
 	$(V1) $(MAKE) --no-print-directory -C $(ROOT_DIR)/flight/OpenPilot --file=$(ROOT_DIR)/flight/OpenPilot/Makefile.win32 $*
diff --git a/flight/OpenPilot/Makefile.win32 b/flight/OpenPilot/Makefile.win32
index 05498866f..1ea309b26 100644
--- a/flight/OpenPilot/Makefile.win32
+++ b/flight/OpenPilot/Makefile.win32
@@ -76,7 +76,7 @@ MODEL    = HD_NB
 endif
 
 # Directory for output files (lst, obj, dep, elf, sym, map, hex, bin etc.)
-OUTDIR = ../../build/flight/sitl_win32
+OUTDIR = ../../build/sitl_win32
 
 # Target file name (without extension).
 TARGET = OpenPilot
@@ -110,7 +110,7 @@ PYMITEINC += $(PYMITEPLAT)
 PYMITEINC += $(OUTDIR)
 FLIGHTPLANLIB = $(OPMODULEDIR)/FlightPlan/lib
 FLIGHTPLANS = $(OPMODULEDIR)/FlightPlan/flightplans
-UAVOBJSYNTHDIR = $(OUTDIR)/../../uavobject-synthetics/flight
+UAVOBJSYNTHDIR = $(OUTDIR)/../uavobject-synthetics/flight
 
 # List C source files here. (C dependencies are automatically generated.)
 # use file-extension c for "c-only"-files