1 files changed, 2 insertions, 1 deletions

diff --git a/include/usage.h b/include/usage.h
index 168d6e1e5..7b8564278 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -852,13 +852,14 @@
        "Relay DHCP requests between clients and server" \
 
 #define diff_trivial_usage \
-       "[-abdiNqrTstw] [-L LABEL] [-S FILE] [-U LINES] FILE1 FILE2"
+       "[-abBdiNqrTstw] [-L LABEL] [-S FILE] [-U LINES] FILE1 FILE2"
 #define diff_full_usage "\n\n" \
        "Compare files line by line and output the differences between them.\n" \
        "This implementation supports unified diffs only.\n" \
      "\nOptions:" \
      "\n        -a      Treat all files as text" \
      "\n        -b      Ignore changes in the amount of whitespace" \
+     "\n        -B      Ignore changes whose lines are all blank" \
      "\n        -d      Try hard to find a smaller set of changes" \
      "\n        -i      Ignore case differences" \
      "\n        -L      Use LABEL instead of the filename in the unified header" \