diff --git a/builder/fuses.py b/builder/fuses.py
index edda251..9eb7ca0 100644
--- a/builder/fuses.py
+++ b/builder/fuses.py
@@ -58,7 +58,14 @@ def get_syscfg0_fuse(eesave, pin, uart):
                 rstpin_bit = 1
         else:
             rstpin_bit = 1
-        return 0xC0 | rstpin_bit << 3 | eesave_bit
+        if ("dd" in board.get("build.mcu").lower()):
+            if pin == "gpio":
+                updipin_bit = 0
+            else:
+                updipin_bit = 1
+        else:
+             updipin_bit = 0
+        return 0xC0 | updipin_bit << 4 | rstpin_bit << 3 | eesave_bit
 
     elif core == "megatinycore":
         if pin == "gpio":
@@ -73,9 +80,9 @@ def get_syscfg0_fuse(eesave, pin, uart):
     env.Exit(1)
 
 
-# Handle AVR-DB's differently since these has MVIO pins
+# Handle AVR-DB's and DD's differently since these has MVIO pins
 def get_syscfg1_fuse(mvio):
-    if core == "dxcore" and ("db" in board.get("build.mcu").lower()):
+    if core == "dxcore" and ("db" or "dd" in board.get("build.mcu").lower()):
         if(mvio == "yes"):
             return 0x0E
         else:
@@ -152,7 +159,7 @@ def calculate_fuses(board_config, predefined_fuses):
     print("Oscillator = %s" % oscillator)
     print("BOD level = %s" % bod)
     print("Save EEPROM = %s" % eesave)
-    if core == "dxcore" and "db" in board.get("build.mcu").lower():
+    if core == "dxcore" and ("db" or "dd" in board.get("build.mcu").lower()):
         print("MVIO enable = %s" % mvio)
     print("%s = %s" % (
         "Reset pin mode" if core in ("MegaCoreX", "dxcore") else "UPDI pin mode", pin))