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-rw-r--r--src/afl-tmin.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/afl-tmin.c b/src/afl-tmin.c
index 43636b6f..b346f65c 100644
--- a/src/afl-tmin.c
+++ b/src/afl-tmin.c
@@ -882,7 +882,8 @@ static void usage(u8 *argv0) {
       "AFL_FORKSRV_INIT_TMOUT: time spent waiting for forkserver during startup (in milliseconds)\n"
       "AFL_KILL_SIGNAL: Signal ID delivered to child processes on timeout, etc. (default: SIGKILL)\n"
       "AFL_FORK_SERVER_KILL_SIGNAL: Signal delivered to fork server processes on termination\n"
-      "                             (default: SIGTERM)\n"
+      "                             (default: SIGTERM). If this is not set and AFL_KILL_SIGNAL is set,\n"
+      "                             this will be set to the same value as AFL_KILL_SIGNAL.\n"
       "AFL_MAP_SIZE: the shared memory size for that target. must be >= the size\n"
       "              the target was compiled for\n"
       "AFL_PRELOAD:  LD_PRELOAD / DYLD_INSERT_LIBRARIES settings for target\n"