--- gcc/objc/objects.c	2018/04/24 18:10:16	1.1
+++ gcc/objc/objects.c	2018/04/24 18:20:13	1.1.1.3
@@ -24,6 +24,7 @@ You should have received a copy of the G
    however invalidate any other reasons why the executable file might be
    covered by the GNU General Public License.  */
 
+#include "../tconfig.h"         /* include defs of bzero for target */
 #include "runtime.h"		/* the kitchen sink */
 
 id __objc_object_alloc(Class*);
@@ -42,7 +43,7 @@ class_create_instance(Class* class)
     new = (*_objc_object_alloc)(class);
   if (new!=nil)
     {
-      bzero (new, class->instance_size);
+      memset (new, 0, class->instance_size);
       new->class_pointer = class;
     }
   return new;