diff --git a/src/fns.c b/src/fns.c
index a65863ce0e8..9bbbb6d7b71 100644
--- a/src/fns.c
+++ b/src/fns.c
@@ -32,13 +32,8 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #include "intervals.h"
 #include "window.h"
 
-#if __GNUC__ >= 4
 static void sort_vector_copy (Lisp_Object, ptrdiff_t,
-			      Lisp_Object [restrict], Lisp_Object [restrict]);
-#else
-static void sort_vector_copy (Lisp_Object, ptrdiff_t,
-			      Lisp_Object [], Lisp_Object []);
-#endif
+			      Lisp_Object *restrict, Lisp_Object *restrict);
 static bool internal_equal (Lisp_Object, Lisp_Object, int, bool, Lisp_Object);
 
 DEFUN ("identity", Fidentity, Sidentity, 1, 1, 0,