diff --git a/src/help.cpp b/src/help.cpp
index 68682a0b..9c6b13a4 100644
--- a/src/help.cpp
+++ b/src/help.cpp
@@ -205,8 +205,8 @@ void show_help(int verbose)
         con_fprintf(f,"\nCompression tuning options:\n");
         fg = con_fg(f,fg);
         con_fprintf(f,
-                    "  --brute             try all available compression methods & filters\n"
-                    "  --ultra-brute       try even more compression variants\n"
+                    "  --brute             try all available compression methods & filters [slow]\n"
+                    "  --ultra-brute       try even more compression variants [very slow]\n"
                     "\n");
         fg = con_fg(f,FG_YELLOW);
         con_fprintf(f,"Backup options:\n");