missing help message

diff --git a/compress.c b/compress.c
index 916d8f8eac4bf297baaa8df598c78bffa4a2d6f7..d8842b472c3c56df515105f6070e398e9aac1690 100644 (file)
--- a/compress.c
+++ b/compress.c
@@ -33,6 +33,8 @@ int usage (int ret)
 {
     int fd = ret ? stdfderr : stdfdout;
     fdprintf (fd, "usage: %s\n", progname);
+    fdprintf (fd, " -c : mode compress\n");
+    fdprintf (fd, " -d : mode decompress\n");
     fdprintf (fd, " -h : help message\n");
     fdprintf (fd, " -i <file>: input file\n");
     fdprintf (fd, " -o <file>: output file\n");