diff --git a/flight/AHRS/Makefile b/flight/AHRS/Makefile
index b57738261..356eaddca 100644
--- a/flight/AHRS/Makefile
+++ b/flight/AHRS/Makefile
@@ -433,7 +433,7 @@ ifeq ($(USE_BOOTLOADER), YES)
 # Program the device with OP Upload Tool".
 program: $(OUTDIR)/$(TARGET).bin
 	@echo ${quote}Programming with OP Upload Tool${quote}
-	../../ground/src/experimental/upload-build-desktop/debug/OPUploadTool.exe -d 1 -p $(OUTDIR)/$(TARGET).bin
+	../../ground/src/experimental/upload-build-desktop/debug/OPUploadTool -d 1 -p $(OUTDIR)/$(TARGET).bin
 else
 ifeq ($(FLASH_TOOL),OPENOCD)
 # Program the device with Dominic Rath's OPENOCD in "batch-mode", needs cfg and "reset-script".