diff --git a/cpukit/ChangeLog b/cpukit/ChangeLog
index 77a544c9a0..af023f4d87 100644
--- a/cpukit/ChangeLog
+++ b/cpukit/ChangeLog
@@ -1,3 +1,8 @@
+2008-12-02	Joel Sherrill <joel.sherrill@OARcorp.com>
+
+	* libcsupport/src/ttyname.c: Correct prototype of ttyname_r() to use
+	size_t for third parameter.
+
 2008-12-02	Joel Sherrill <joel.sherrill@OARcorp.com>
 
 	* libmisc/shell/main_cp.c, libmisc/shell/main_ls.c,
diff --git a/cpukit/libcsupport/src/ttyname.c b/cpukit/libcsupport/src/ttyname.c
index d483349235..59ea29be6e 100644
--- a/cpukit/libcsupport/src/ttyname.c
+++ b/cpukit/libcsupport/src/ttyname.c
@@ -59,9 +59,9 @@ static char ttyname_buf[sizeof (_PATH_DEV) + MAXNAMLEN] = _PATH_DEV;
  *  ttyname_r() - POSIX 1003.1b 4.7.2 - Demetermine Terminal Device Name
  */
 int ttyname_r(
-  int   fd,
-  char *name,
-  int   namesize
+  int     fd,
+  char   *name,
+  size_t  namesize
 )
 {
   struct stat sb;