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-rw-r--r--signal.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/signal.c b/signal.c
index 5098b8ddb3..a3f4a20774 100644
--- a/signal.c
+++ b/signal.c
@@ -374,6 +374,8 @@ static void signal_enque(int sig);
* a POSIX signal name (either with or without a +SIG+ prefix). If _signal_ is
* negative (or starts with a minus sign), kills process groups instead of
* processes. Not all signals are available on all platforms.
+ * The keys and values of +Signal.list+ are known signal names and numbers,
+ * respectively.
*
* pid = fork do
* Signal.trap("HUP") { puts "Ouch!"; exit }