diff --git a/libio/iofopncook.c b/libio/iofopncook.c
index 419b02d6da..59034c7db4 100644
--- a/libio/iofopncook.c
+++ b/libio/iofopncook.c
@@ -29,13 +29,12 @@
 
 
 /* Prototyped for local functions.  */
-static _IO_ssize_t _IO_cookie_read __P ((register _IO_FILE* fp, void* buf,
-					 _IO_ssize_t size));
-static _IO_ssize_t _IO_cookie_write __P ((register _IO_FILE* fp,
-					  const void* buf, _IO_ssize_t size));
-static _IO_off64_t _IO_cookie_seek __P ((_IO_FILE *fp, _IO_off64_t offset,
-					 int dir));
-static int _IO_cookie_close __P ((_IO_FILE* fp));
+static _IO_ssize_t _IO_cookie_read (register _IO_FILE* fp, void* buf,
+				    _IO_ssize_t size);
+static _IO_ssize_t _IO_cookie_write (register _IO_FILE* fp,
+				     const void* buf, _IO_ssize_t size);
+static _IO_off64_t _IO_cookie_seek (_IO_FILE *fp, _IO_off64_t offset, int dir);
+static int _IO_cookie_close (_IO_FILE* fp);
 
 
 static _IO_ssize_t