diff --git a/src/cli.c b/src/cli.c
index 33af24be..3571830f 100644
--- a/src/cli.c
+++ b/src/cli.c
@@ -372,9 +372,9 @@ void print_help(void)
     "                                     \"frametile\": constrain within the tile\n"
     "                                     \"frametilemargin\": constrain even more\n"
     "          --hash                 : Specify which decoded picture hash to use [checksum]\n"
-    "                                     \"none\": no constraint\n"
-    "                                     \"checksum\": constrain within the tile\n"
-    "                                     \"md5\": constrain even more\n"
+    "                                     \"none\": 0 bytes\n"
+    "                                     \"checksum\": 18 bytes\n"
+    "                                     \"md5\": 56 bytes\n"
     "          --cu-split-termination : Specify the cu split termination behaviour\n"
     "                                     \"zero\": Terminate when splitting gives little\n"
     "                                               improvement.\n"