diff --git a/src/avrdude.conf.in b/src/avrdude.conf.in
index 2fc59ecd..2e66c360 100644
--- a/src/avrdude.conf.in
+++ b/src/avrdude.conf.in
@@ -18932,6 +18932,7 @@ part parent    ".avrdx"
     id        = "avr16dd14";
     desc      = "AVR16DD14";
     signature = 0x1E 0x94 0x34;
+    hvupdi_variant = 2;
 
     memory "flash"
         size      = 0x4000;
@@ -18956,6 +18957,7 @@ part parent    ".avrdx"
     id        = "avr16dd20";
     desc      = "AVR16DD20";
     signature = 0x1E 0x94 0x33;
+    hvupdi_variant = 2;
 
     memory "flash"
         size      = 0x4000;
@@ -18980,6 +18982,7 @@ part parent    ".avrdx"
     id        = "avr16dd28";
     desc      = "AVR16DD28";
     signature = 0x1E 0x94 0x32;
+    hvupdi_variant = 2;
 
     memory "flash"
         size      = 0x4000;
@@ -19004,6 +19007,7 @@ part parent    ".avrdx"
     id        = "avr16dd32";
     desc      = "AVR16DD32";
     signature = 0x1E 0x94 0x31;
+    hvupdi_variant = 2;
 
     memory "flash"
         size      = 0x4000;
@@ -19028,6 +19032,7 @@ part parent    ".avrdx"
     id        = "avr32dd14";
     desc      = "AVR32DD14";
     signature = 0x1E 0x95 0x3B;
+    hvupdi_variant = 2;
 
     memory "flash"
         size      = 0x8000;
@@ -19052,6 +19057,7 @@ part parent    ".avrdx"
     id        = "avr32dd20";
     desc      = "AVR32DD20";
     signature = 0x1E 0x95 0x3A;
+    hvupdi_variant = 2;
 
     memory "flash"
         size      = 0x8000;
@@ -19076,6 +19082,7 @@ part parent    ".avrdx"
     id        = "avr32dd28";
     desc      = "AVR32DD28";
     signature = 0x1E 0x95 0x39;
+    hvupdi_variant = 2;
 
     memory "flash"
         size      = 0x8000;
@@ -19100,6 +19107,7 @@ part parent    ".avrdx"
     id        = "avr32dd32";
     desc      = "AVR32DD32";
     signature = 0x1E 0x95 0x38;
+    hvupdi_variant = 2;
 
     memory "flash"
         size      = 0x8000;
@@ -19124,6 +19132,7 @@ part parent    ".avrdx"
     id        = "avr64dd14";
     desc      = "AVR64DD14";
     signature = 0x1E 0x96 0x1D;
+    hvupdi_variant = 2;
 
     memory "flash"
         size      = 0x10000;
@@ -19148,6 +19157,7 @@ part parent    ".avrdx"
     id        = "avr64dd20";
     desc      = "AVR64DD20";
     signature = 0x1E 0x96 0x1C;
+    hvupdi_variant = 2;
 
     memory "flash"
         size      = 0x10000;
@@ -19172,6 +19182,7 @@ part parent    ".avrdx"
     id        = "avr64dd28";
     desc      = "AVR64DD28";
     signature = 0x1E 0x96 0x1B;
+    hvupdi_variant = 2;
 
     memory "flash"
         size      = 0x10000;
@@ -19196,6 +19207,7 @@ part parent    ".avrdx"
     id        = "avr64dd32";
     desc      = "AVR64DD32";
     signature = 0x1E 0x96 0x1A;
+    hvupdi_variant = 2;
 
     memory "flash"
         size      = 0x10000;