diff --git a/ChangeLog b/ChangeLog
index 174df52ea7..3d0919ea7d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Nov 28 12:57:29 2011  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* io.c (rb_write_error2): fwrite() returns ssize_t.
+
 Mon Nov 28 12:47:19 2011  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* parse.y (nodetype, nodeline): static.  these functions are for
diff --git a/io.c b/io.c
index 4b5896a596..2c4b01dc11 100644
--- a/io.c
+++ b/io.c
@@ -6599,7 +6599,7 @@ void
 rb_write_error2(const char *mesg, long len)
 {
     if (rb_stderr == orig_stderr || RFILE(orig_stderr)->fptr->fd < 0) {
-	int unused;
+	ssize_t unused;
 	unused = fwrite(mesg, sizeof(char), len, stderr);
     }
     else {