fixed usaged text for cdf

1 files changed, 1 insertions, 1 deletions

diff --git a/src/cdf.c b/src/cdf.c
index 7d0bd87..8fe1ea6 100644
--- a/src/cdf.c
+++ b/src/cdf.c
@@ -59,7 +59,7 @@ static int parse_options(int argc, char*const* argv) {
 }
 
 static void help() {
-  fprintf(stderr, "Usage:\ncdf [-f] [-r] [filename]\n");
+  fprintf(stderr, "Usage:\ncdf [-f|-u] [-r] [filename]\n");
 }
 
 static DistRecord *expand_array(DistRecord *records, size_t *capacity) {