diff --git a/armsrc/iso15693.c b/armsrc/iso15693.c
index b7c07e0ea..bd2d1c345 100644
--- a/armsrc/iso15693.c
+++ b/armsrc/iso15693.c
@@ -2130,6 +2130,9 @@ void SimTagIso15693(uint8_t *uid, uint8_t block_size) {
 
     // free eventually allocated BigBuf memory
     BigBuf_free_keep_EM();
+    // Init early to be sure FPGA is loaded before any EML operation
+    // usefull when eml memory is empty (UID supplied)
+    Iso15693InitTag(); // to be sure FPGA is loaded before any EML operation 
 
     iso15_tag_t *tag = (iso15_tag_t *) BigBuf_get_EM_addr();
     if (tag == NULL) {
@@ -2176,8 +2179,6 @@ void SimTagIso15693(uint8_t *uid, uint8_t block_size) {
         return;
     }
 
-    Iso15693InitTag();
-
     LED_A_ON();
 
     if (g_dbglevel >= DBG_DEBUG) {