diff --git a/ChangeLog b/ChangeLog
index 2f15bd72f9..0b34aa069f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Fri Oct 21 19:16:08 2005  Hirokazu Yamamoto  <ocean@m2.ccsnet.ne.jp>
+
+	* rubysig.h (CHECK_INTS): fixed typo. (I believe bit-or is improper)
+
 Fri Oct 21 17:49:32 2005  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* bin/erb (ERB::Main::run): typo fixed.  [ruby-core:06337]
diff --git a/rubysig.h b/rubysig.h
index ac5519c13a..bce1c4f2aa 100644
--- a/rubysig.h
+++ b/rubysig.h
@@ -82,7 +82,7 @@ void rb_thread_schedule(void);
 #if defined(HAVE_SETITIMER) || defined(_THREAD_SAFE)
 RUBY_EXTERN int rb_thread_pending;
 # define CHECK_INTS do {\
-    if (!(rb_prohibit_interrupt | rb_thread_critical)) {\
+    if (!(rb_prohibit_interrupt || rb_thread_critical)) {\
         if (rb_thread_pending) rb_thread_schedule();\
 	if (rb_trap_pending) rb_trap_exec();\
     }\
@@ -92,10 +92,10 @@ RUBY_EXTERN int rb_thread_pending;
 RUBY_EXTERN int rb_thread_tick;
 #define THREAD_TICK 500
 #define CHECK_INTS do {\
-    if (!(rb_prohibit_interrupt | rb_thread_critical)) {\
+    if (!(rb_prohibit_interrupt || rb_thread_critical)) {\
 	if (rb_thread_tick-- <= 0) {\
-	    rb_thread_tick = THREAD_TICK;
-            rb_thread_schedule();
+	    rb_thread_tick = THREAD_TICK;\
+            rb_thread_schedule();\
 	}\
     }\
    if (rb_trap_pending) rb_trap_exec();\