diff --git a/fusee/fusee-secondary/src/key_derivation.c b/fusee/fusee-secondary/src/key_derivation.c
index a216b2465..c048cc05d 100644
--- a/fusee/fusee-secondary/src/key_derivation.c
+++ b/fusee/fusee-secondary/src/key_derivation.c
@@ -80,7 +80,7 @@ static int decrypt_keyblob(const nx_keyblob_t *keyblobs, uint32_t revision, uint
     decrypt_data_into_keyslot(0xB, keyslot, keyblob_mac_seed, 0x10);
     
     /* Validate keyblob. */
-    se_compute_aes_128_cmac(0xB, work_buffer, 0x10, &keyblob + sizeof(keyblob.mac), sizeof(keyblob) - sizeof(keyblob.mac));
+    se_compute_aes_128_cmac(0xB, work_buffer, 0x10, keyblob.mac + sizeof(keyblob.mac), sizeof(keyblob) - sizeof(keyblob.mac));
     if (safe_memcmp(keyblob.mac, work_buffer, 0x10)) {
         return -1;
     }