1 files changed, 1 insertions, 0 deletions
diff --git a/tshark.c b/tshark.c
index 2321b8bbd8..ad81471b2d 100644
--- a/tshark.c
+++ b/tshark.c
@@ -358,6 +358,7 @@ print_usage(FILE *output)
   fprintf(output, "Processing:\n");
   fprintf(output, "  -2                       perform a two-pass analysis\n");
   fprintf(output, "  -R <read filter>         packet Read filter in Wireshark display filter syntax\n");
+  fprintf(output, "                           (requires -2)\n");
   fprintf(output, "  -Y <display filter>      packet displaY filter in Wireshark display filter\n");
   fprintf(output, "                           syntax\n");
   fprintf(output, "  -n                       disable all name resolutions (def: all enabled)\n");