diff --git a/examples/mifare-classic-write-ndef.c b/examples/mifare-classic-write-ndef.c
index d48f572..e3eb285 100644
--- a/examples/mifare-classic-write-ndef.c
+++ b/examples/mifare-classic-write-ndef.c
@@ -227,43 +227,43 @@ main(int argc, char *argv[])
 	    } else {
 
 		// Create a MAD and mark unaccessible sectors in the card
-	    if (!(mad = mad_new ((freefare_get_tag_type (tags[i]) == CLASSIC_4K) ? 2 : 1))) {
-		perror ("mad_new");
-		error = 1;
-		goto error;
-	    }
+		if (!(mad = mad_new ((freefare_get_tag_type (tags[i]) == CLASSIC_4K) ? 2 : 1))) {
+		    perror ("mad_new");
+		    error = 1;
+		    goto error;
+		}
 
-	    MifareClassicSectorNumber max_s;
-	    switch (freefare_get_tag_type (tags[i])) {
-		case CLASSIC_1K:
-		    max_s = 15;
-		    break;
-		case CLASSIC_4K:
-		    max_s = 39;
-		    break;
-		default:
-		    /* Keep compiler quiet */
-		    break;
-	    }
+		MifareClassicSectorNumber max_s;
+		switch (freefare_get_tag_type (tags[i])) {
+		    case CLASSIC_1K:
+			max_s = 15;
+			break;
+		    case CLASSIC_4K:
+			max_s = 39;
+			break;
+		    default:
+			/* Keep compiler quiet */
+			break;
+		}
 
-	    MifareClassicKey transport_key = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
+		MifareClassicKey transport_key = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 
-	    // Mark unusable sectors as so
-	    for (size_t s = max_s; s; s--) {
-		if (s == 0x10) continue;
-		if (!search_sector_key (tags[i], s, &(card_write_keys[s].key), &(card_write_keys[s].type))) {
-		    mad_set_aid (mad, s, mad_defect_aid);
-		} else if ((memcmp (card_write_keys[s].key, transport_key, sizeof (transport_key)) != 0) &&
-			   (card_write_keys[s].type != MFC_KEY_A)) {
-		    // Revert to transport configuration
-		    if (mifare_classic_format_sector (tags[i], s) < 0) {
-			perror ("mifare_classic_format_sector");
-			error = 1;
-			goto error;
+		// Mark unusable sectors as so
+		for (size_t s = max_s; s; s--) {
+		    if (s == 0x10) continue;
+		    if (!search_sector_key (tags[i], s, &(card_write_keys[s].key), &(card_write_keys[s].type))) {
+			mad_set_aid (mad, s, mad_defect_aid);
+		    } else if ((memcmp (card_write_keys[s].key, transport_key, sizeof (transport_key)) != 0) &&
+			    (card_write_keys[s].type != MFC_KEY_A)) {
+			// Revert to transport configuration
+			if (mifare_classic_format_sector (tags[i], s) < 0) {
+			    perror ("mifare_classic_format_sector");
+			    error = 1;
+			    goto error;
+			}
 		    }
 		}
 	    }
-	    }
 
 	    MifareClassicSectorNumber *sectors = mifare_application_alloc (mad, mad_nfcforum_aid, encoded_size);
 	    if (!sectors) {