diff --git a/src/chgrp.c b/src/chgrp.c
index 83ba080..cab49b8 100644
--- a/src/chgrp.c
+++ b/src/chgrp.c
@@ -185,6 +185,7 @@ int main(int argc, char * argv[])
 				/* FIXME implement */
 				fprintf(stderr, "%s%c%s", PROGNAME ": -", o,
 						": Not yet implemented\n");
+				return 2;
 			default:
 				return _usage();
 		}
diff --git a/src/chown.c b/src/chown.c
index a079124..3754085 100644
--- a/src/chown.c
+++ b/src/chown.c
@@ -235,6 +235,7 @@ int main(int argc, char * argv[])
 			case 'P':
 				fprintf(stderr, "%s%c%s", PROGNAME ": -", o,
 						": Not yet implemented\n");
+				return 2;
 			default:
 				return _usage();
 		}