diff --git a/Makefile b/Makefile
index f0ebac8..35b82c1 100644
--- a/Makefile
+++ b/Makefile
@@ -61,7 +61,7 @@ flash: $(TARGET)
 	$(Q) $(AVD) -l $(LOGFILE)    \
 	       -c $(ASP) -p $(ARCH)  \
 	       -U lfuse:w:0xff:m     \
-	       -U hfuse:w:0x99:m     \
+	       -U hfuse:w:0x91:m     \
 	       -U flash:w:$(TARGET)
 
 .PHONY: clean