diff --git a/package/utils/fritz-tools/src/fritz_tffs_read.c b/package/utils/fritz-tools/src/fritz_tffs_read.c
index f367e02e04..7c311a90ca 100644
--- a/package/utils/fritz-tools/src/fritz_tffs_read.c
+++ b/package/utils/fritz-tools/src/fritz_tffs_read.c
@@ -259,7 +259,7 @@ static void parse_options(int argc, char *argv[])
 	{
 		int c;
 
-		c = getopt(argc, argv, "abhi:ln:s");
+		c = getopt(argc, argv, "abhi:ln:s:");
 		if (c == -1)
 			break;