diff --git a/src/lib/libc/string/memcpy.c b/src/lib/libc/string/memcpy.c
index a2516ed0..19fddc0a 100644
--- a/src/lib/libc/string/memcpy.c
+++ b/src/lib/libc/string/memcpy.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: memcpy.c,v 1.3 2017/08/14 17:10:02 guenther Exp $ */
+/*	$OpenBSD: memcpy.c,v 1.4 2017/11/29 05:13:57 guenther Exp $ */
 /*-
  * Copyright (c) 1990 The Regents of the University of California.
  * All rights reserved.
@@ -106,4 +106,4 @@ memcpy(void *dst0, const void *src0, size_t length)
 done:
 	return (dst0);
 }
-DEF_STRONG(memcpy);
+DEF_BUILTIN(memcpy);
diff --git a/src/lib/libc/string/memmove.c b/src/lib/libc/string/memmove.c
index 2f1deb2c..1cd1086a 100644
--- a/src/lib/libc/string/memmove.c
+++ b/src/lib/libc/string/memmove.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: memmove.c,v 1.2 2015/08/31 02:53:57 guenther Exp $ */
+/*	$OpenBSD: memmove.c,v 1.3 2017/11/29 05:13:57 guenther Exp $ */
 /*-
  * Copyright (c) 1990 The Regents of the University of California.
  * All rights reserved.
@@ -110,4 +110,4 @@ memmove(void *dst0, const void *src0, size_t length)
 done:
 	return (dst0);
 }
-DEF_STRONG(memmove);
+DEF_BUILTIN(memmove);
diff --git a/src/lib/libc/string/memset.c b/src/lib/libc/string/memset.c
index 242529ee..0c261f09 100644
--- a/src/lib/libc/string/memset.c
+++ b/src/lib/libc/string/memset.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: memset.c,v 1.7 2015/08/31 02:53:57 guenther Exp $ */
+/*	$OpenBSD: memset.c,v 1.8 2017/11/29 05:13:57 guenther Exp $ */
 /*-
  * Copyright (c) 1990 The Regents of the University of California.
  * All rights reserved.
@@ -45,4 +45,4 @@ memset(void *dst, int c, size_t n)
 	}
 	return (dst);
 }
-DEF_STRONG(memset);
+DEF_BUILTIN(memset);