2 files changed, 6 insertions, 2 deletions
diff --git a/ChangeLog b/ChangeLog
index ef1fbc5556..c400fdb1d2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Dec 29 10:06:51 2010  Tanaka Akira  <akr@fsij.org>
+
+	* signal.c: parenthesize macro arguments.
+
 Wed Dec 29 07:22:15 2010  Eric Hodel  <drbrain@segment7.net>
 
 	* lib/rake/rdoctask.rb: Deprecate in favor of rdoc/task.
diff --git a/signal.c b/signal.c
index 8321d0774f..27d90acf4d 100644
--- a/signal.c
+++ b/signal.c
@@ -354,7 +354,7 @@ VALUE
 rb_f_kill(int argc, VALUE *argv)
 {
 #ifndef HAS_KILLPG
-#define killpg(pg, sig) kill(-(pg), sig)
+#define killpg(pg, sig) kill(-(pg), (sig))
 #endif
     int negative = 0;
     int sig;
@@ -508,7 +508,7 @@ posix_signal(int signum, sighandler_t handler)
 }
 
 #else /* !POSIX_SIGNAL */
-#define ruby_signal(sig,handler) (/* rb_trap_accept_nativethreads[sig] = 0,*/ signal((sig),(handler)))
+#define ruby_signal(sig,handler) (/* rb_trap_accept_nativethreads[(sig)] = 0,*/ signal((sig),(handler)))
 #if 0 /* def HAVE_NATIVETHREAD */
 static sighandler_t
 ruby_nativethread_signal(int signum, sighandler_t handler)