diff --git a/src/fido/fido.c b/src/fido/fido.c
index 14334d9..4eb076f 100644
--- a/src/fido/fido.c
+++ b/src/fido/fido.c
@@ -289,6 +289,7 @@ int scan_files(bool core1) {
     else {
         printf("FATAL ERROR: Auth Token not found in memory!\r\n");
     }
+    ef_largeblob = search_by_fid(EF_LARGEBLOB, NULL, SPECIFY_EF);
     low_flash_available();
     return CCID_OK;
 }
diff --git a/src/fido/files.c b/src/fido/files.c
index 0e7e52e..fe917da 100644
--- a/src/fido/files.c
+++ b/src/fido/files.c
@@ -29,6 +29,7 @@ file_t file_entries[] = {
     {.fid = EF_AUTHTOKEN,  .parent = 0, .name = NULL, .type = FILE_TYPE_INTERNAL_EF | FILE_DATA_FLASH, .data = NULL, .ef_structure = FILE_EF_TRANSPARENT, .acl = {0xff}},   // AUTH TOKEN
     {.fid = EF_MINPINLEN,  .parent = 0, .name = NULL, .type = FILE_TYPE_INTERNAL_EF | FILE_DATA_FLASH, .data = NULL, .ef_structure = FILE_EF_TRANSPARENT, .acl = {0xff}},   // MIN PIN LENGTH
     {.fid = EF_OPTS,  .parent = 0, .name = NULL, .type = FILE_TYPE_INTERNAL_EF | FILE_DATA_FLASH, .data = NULL, .ef_structure = FILE_EF_TRANSPARENT, .acl = {0xff}},   // Global options
+    {.fid = EF_LARGEBLOB,  .parent = 0, .name = NULL, .type = FILE_TYPE_INTERNAL_EF | FILE_DATA_FLASH, .data = NULL, .ef_structure = FILE_EF_TRANSPARENT, .acl = {0xff}},   // Large Blob
     { .fid = 0x0000, .parent = 0xff, .name = NULL, .type = FILE_TYPE_UNKNOWN, .data = NULL, .ef_structure = 0, .acl = {0} } //end
 };
 
@@ -40,3 +41,4 @@ file_t *ef_counter = NULL;
 file_t *ef_pin = NULL;
 file_t *ef_authtoken = NULL;
 file_t *ef_keydev_enc = NULL;
+file_t *ef_largeblob = NULL;
diff --git a/src/fido/files.h b/src/fido/files.h
index ad96ca0..32fab52 100644
--- a/src/fido/files.h
+++ b/src/fido/files.h
@@ -31,6 +31,7 @@
 #define EF_MINPINLEN    0x1100
 #define EF_CRED         0xCF00 // Creds at 0xCF00 - 0xCFFF
 #define EF_RP           0xD000 // RPs at 0xD000 - 0xD0FF
+#define EF_LARGEBLOB    0x1101 // Large Blob Array
 
 extern file_t *ef_keydev;
 extern file_t *ef_certdev;
@@ -38,5 +39,6 @@ extern file_t *ef_counter;
 extern file_t *ef_pin;
 extern file_t *ef_authtoken;
 extern file_t *ef_keydev_enc;
+extern file_t *ef_largeblob;
 
 #endif //_FILES_H_