diff --git a/examples/mifare-classic-read-ndef.c b/examples/mifare-classic-read-ndef.c
index 7e3abfb..7443dca 100644
--- a/examples/mifare-classic-read-ndef.c
+++ b/examples/mifare-classic-read-ndef.c
@@ -87,6 +87,7 @@ main(int argc, char *argv[])
 	case '?':
 	    if (optopt == 'o')
 		fprintf (stderr, "Option -%c requires an argument.\n", optopt);
+	    /* FALLTHROUGH */
 	default:
 	    usage (argv[0]);
 	    exit (EXIT_FAILURE);
diff --git a/examples/mifare-classic-write-ndef.c b/examples/mifare-classic-write-ndef.c
index f0703bf..937af58 100644
--- a/examples/mifare-classic-write-ndef.c
+++ b/examples/mifare-classic-write-ndef.c
@@ -157,6 +157,7 @@ main(int argc, char *argv[])
 	case '?':
 	    if (optopt == 'i')
 		fprintf (stderr, "Option -%c requires an argument.\n", optopt);
+	    /* FALLTHROUGH */
 	default:
 	    usage (argv[0]);
 	    exit (EXIT_FAILURE);