diff --git a/ChangeLog b/ChangeLog
index 4f71c4711a..2b0807fa8a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Mar 18 22:19:52 2002  Nobuyoshi Nakada  <nobu.nakada@nifty.ne.jp>
+
+	* ext/stringio/stringio.c (check_modifiable): wrong declaration.
+
 Mon Mar 18 18:04:05 2002  Nobuyoshi Nakada  <nobu.nakada@nifty.ne.jp>
 
 	* ext/digest: add depend file.
diff --git a/ext/stringio/stringio.c b/ext/stringio/stringio.c
index 14611a77f7..27b8aba8ba 100644
--- a/ext/stringio/stringio.c
+++ b/ext/stringio/stringio.c
@@ -32,7 +32,7 @@ static struct StringIO* check_strio _((VALUE));
 static struct StringIO* get_strio _((VALUE));
 static struct StringIO* readable _((struct StringIO *));
 static struct StringIO* writable _((struct StringIO *));
-static struct void check_modifiable _((struct StringIO *));
+static void check_modifiable _((struct StringIO *));
 
 #define IS_STRIO(obj) (RDATA(obj)->dmark == (RUBY_DATA_FUNC)strio_mark)
 #define error_inval(msg) (errno = EINVAL, rb_sys_fail(msg))
@@ -118,7 +118,7 @@ writable(ptr)
     return ptr;
 }
 
-static struct void
+static void
 check_modifiable(ptr)
     struct StringIO *ptr;
 {