diff --git a/ChangeLog b/ChangeLog
index c8af96cad3..009284ef93 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Nov 26 18:19:47 2012  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
+
+	* signal.c (signal_exec): suppress "warning: variable 'signum'
+	  might be clobbered by 'longjmp' or 'vfork'" warning.
+
 Mon Nov 26 18:15:47 2012  Koichi Sasada  <ko1@atdot.net>
 
 	* benchmark/driver.rb: accept multiple `-e'.
diff --git a/signal.c b/signal.c
index 9f1717e012..ea82faf500 100644
--- a/signal.c
+++ b/signal.c
@@ -623,7 +623,6 @@ sigsegv(int sig SIGINFO_ARG)
 static void
 signal_exec(VALUE cmd, int safe, int sig)
 {
-    VALUE signum = INT2NUM(sig);
     rb_thread_t *cur_th = GET_THREAD();
     int old_in_trap = cur_th->in_trap;
     int state;
@@ -631,6 +630,7 @@ signal_exec(VALUE cmd, int safe, int sig)
     cur_th->in_trap = 1;
     TH_PUSH_TAG(cur_th);
     if ((state = EXEC_TAG()) == 0) {
+	VALUE signum = INT2NUM(sig);
 	rb_eval_cmd(cmd, rb_ary_new3(1, signum), safe);
     }
     TH_POP_TAG();