diff --git a/ChangeLog b/ChangeLog
index fcd3d24a05..3af3c64e0f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Thu May  7 13:10:25 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* io.c (pipe_open): should be rb_pid_t.
+
 Wed May  6 16:50:20 2009  Tanaka Akira  <akr@fsij.org>
 
 	* math.c (math_gamma): use a table for positive small integers.
diff --git a/io.c b/io.c
index 9c68be15bf..72bb5b77c7 100644
--- a/io.c
+++ b/io.c
@@ -4593,7 +4593,7 @@ popen_exec(void *pp, char *errmsg, size_t errmsg_len)
 static VALUE
 pipe_open(struct rb_exec_arg *eargp, VALUE prog, const char *modestr, int fmode, convconfig_t *convconfig)
 {
-    int pid = 0;
+    rb_pid_t pid = 0;
     rb_io_t *fptr;
     VALUE port;
     rb_io_t *write_fptr;
diff --git a/version.h b/version.h
index 488e344acc..915d324a25 100644
--- a/version.h
+++ b/version.h
@@ -1,5 +1,5 @@
 #define RUBY_VERSION "1.9.2"
-#define RUBY_RELEASE_DATE "2009-05-06"
+#define RUBY_RELEASE_DATE "2009-05-07"
 #define RUBY_PATCHLEVEL -1
 #define RUBY_BRANCH_NAME "trunk"
 
@@ -8,7 +8,7 @@
 #define RUBY_VERSION_TEENY 1
 #define RUBY_RELEASE_YEAR 2009
 #define RUBY_RELEASE_MONTH 5
-#define RUBY_RELEASE_DAY 6
+#define RUBY_RELEASE_DAY 7
 
 #ifdef RUBY_EXTERN
 RUBY_EXTERN const char ruby_version[];