diff --git a/common/generator.c b/common/generator.c
index 85be456f4..5918ce7c8 100644
--- a/common/generator.c
+++ b/common/generator.c
@@ -182,6 +182,13 @@ uint16_t ul_ev1_packgenD(uint8_t *uid) {
     return BSWAP_16(p & 0xFFFF);
 }
 
+uint32_t ul_ev1_pwdgen_def(uint8_t *uid) {
+    return 0xFFFFFFFF;
+}
+uint16_t ul_ev1_packgen_def(uint8_t *uid) {
+    return 0x0000;
+}
+
 //------------------------------------
 // MFC key generation stuff
 // Each algo implementation should offer two key generation functions.
diff --git a/common/generator.h b/common/generator.h
index e0c045426..5467ed470 100644
--- a/common/generator.h
+++ b/common/generator.h
@@ -13,11 +13,13 @@
 
 #include "common.h"
 
+uint32_t ul_ev1_pwdgen_def(uint8_t *uid);
 uint32_t ul_ev1_pwdgenA(uint8_t *uid);
 uint32_t ul_ev1_pwdgenB(uint8_t *uid);
 uint32_t ul_ev1_pwdgenC(uint8_t *uid);
 uint32_t ul_ev1_pwdgenD(uint8_t *uid);
 
+uint16_t ul_ev1_packgen_def(uint8_t *uid);
 uint16_t ul_ev1_packgenA(uint8_t *uid);
 uint16_t ul_ev1_packgenB(uint8_t *uid);
 uint16_t ul_ev1_packgenC(uint8_t *uid);