diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c
index a657dff35..fd146c23e 100644
--- a/armsrc/iso14443a.c
+++ b/armsrc/iso14443a.c
@@ -980,14 +980,26 @@ bool SimulateIso14443aInit(int tagType, int flags, uint8_t *data, tag_response_i
             // some first pages of UL/NTAG dump is special data
             mfu_dump_t *mfu_header = (mfu_dump_t *) BigBuf_get_EM_addr();
             *pages = MAX(mfu_header->pages, 19);
+
             // counters and tearing flags
-            for (int i = 0; i < 3; i++) {
+            // for old dumps with all zero headers, we need to set default values.
+            for (uint8_t i = 0; i < 3; i++) {
+
                 counters[i] = le24toh(mfu_header->counter_tearing[i]);
-                tearings[i] = mfu_header->counter_tearing[i][3];
+
+                if (mfu_header->counter_tearing[i][3] != 0x00) {
+                    tearings[i] = mfu_header->counter_tearing[i][3]; 
+                }
             }
+
             // GET_VERSION
-            memcpy(rVERSION, mfu_header->version, 8);
+            if (memcmp(mfu_header->version, "\x00\x00\x00\x00\x00\x00\x00\x00", 8) == 0) {
+                memcpy(rVERSION, "\x00\x04\x04\x02\x01\x00\x11\x03", 8);
+            } else {
+                memcpy(rVERSION, mfu_header->version, 8);
+            }
             AddCrc14A(rVERSION, sizeof(rVERSION) - 2);
+
             // READ_SIG
             memcpy(rSIGN, mfu_header->signature, 32);
             AddCrc14A(rSIGN, sizeof(rSIGN) - 2);