diff --git a/bootloader168/Makefile b/bootloader168/Makefile
index 5a82bf4b9..669879b7b 100755
--- a/bootloader168/Makefile
+++ b/bootloader168/Makefile
@@ -37,7 +37,7 @@ LDSECTION  = --section-start=.text=0x3800
 # unlock the bootloader section) and 0xcf instead of 0x0f (to
 # lock it), but since the high two bits of the lock byte are
 # unused, avrdude would get confused.
-ISPFUSES    = avrdude -c $(ISPTOOL) -p m168 -P $(ISPPORT) $(ISPSPEED) -e -u -U lock:w:0x3f:m -U efuse:w:0x00:m -U hfuse:w:0xdf:m -U lfuse:w:0xff:m
+ISPFUSES    = avrdude -c $(ISPTOOL) -p m168 -P $(ISPPORT) $(ISPSPEED) -e -u -U lock:w:0x3f:m -U efuse:w:0x00:m -U hfuse:w:0xdd:m -U lfuse:w:0xff:m
 ISPFLASH    = avrdude -c $(ISPTOOL) -p m168 -P $(ISPPORT) $(ISPSPEED) -U flash:w:$(PROGRAM)_$(TARGET).hex -U lock:w:0x0f:m
 
 
diff --git a/build/shared/lib/preferences.txt b/build/shared/lib/preferences.txt
index 0d86fcce9..dc87adcc0 100755
--- a/build/shared/lib/preferences.txt
+++ b/build/shared/lib/preferences.txt
@@ -296,7 +296,7 @@ bootloader.atmega8.programmer=stk500
 bootloader.atmega8.communication=serial
 
 bootloader.atmega168-ng.low_fuses=0xff
-bootloader.atmega168-ng.high_fuses=0xdf
+bootloader.atmega168-ng.high_fuses=0xdd
 bootloader.atmega168-ng.extended_fuses=0x00
 bootloader.atmega168-ng.path=bootloader168
 bootloader.atmega168-ng.file=ATmegaBOOT_168_ng.hex
@@ -306,7 +306,7 @@ bootloader.atmega168-ng.programmer=avrispmkii
 bootloader.atmega168-ng.communication=usb
 
 bootloader.atmega168-diecimila.low_fuses=0xff
-bootloader.atmega168-diecimila.high_fuses=0xdf
+bootloader.atmega168-diecimila.high_fuses=0xdd
 bootloader.atmega168-diecimila.extended_fuses=0x00
 bootloader.atmega168-diecimila.path=bootloader168
 bootloader.atmega168-diecimila.file=ATmegaBOOT_168_diecimila.hex