diff --git a/coreutils/install.c b/coreutils/install.c
index 3128c5bd9..84e60f934 100644
--- a/coreutils/install.c
+++ b/coreutils/install.c
@@ -54,8 +54,14 @@ extern int install_main(int argc, char **argv)
 	int i;
 
 	/* -c exists for backwards compatability, its needed */
+	bb_opt_complementaly = "s~d:d~s";
 	flags = bb_getopt_ulflags(argc, argv, "cdpsg:m:o:", &gid_str, &mode_str, &uid_str);	/* 'a' must be 2nd */
 
+	/* Check valid options were given */
+	if(flags & 0x80000000UL) {
+		bb_show_usage();
+	}
+
 	/* preserve access and modification time, this is GNU behaviour, BSD only preserves modification time */
 	if (flags & INSTALL_OPT_PRESERVE_TIME) {
 		copy_flags |= FILEUTILS_PRESERVE_STATUS;