diff --git a/lib/libc/arch/i386/string/Makefile.inc b/lib/libc/arch/i386/string/Makefile.inc
index c1611747ac00..8cb729d578a8 100644
--- a/lib/libc/arch/i386/string/Makefile.inc
+++ b/lib/libc/arch/i386/string/Makefile.inc
@@ -1,6 +1,6 @@
-#	$NetBSD: Makefile.inc,v 1.5 2009/07/30 20:57:16 dsl Exp $
+#	$NetBSD: Makefile.inc,v 1.6 2020/01/27 22:08:08 ad Exp $
 
 # objects built from assembler sources
-SRCS+=	bcmp.S bcopy.S bzero.S ffs.S memchr.S memcmp.S \
+SRCS+=	bcopy.S bzero.S ffs.S memchr.S \
 	memcpy.S memmove.S memset.S strcat.S strchr.S \
 	strcmp.S strcpy.S strlen.S strncmp.S strrchr.S swab.S
diff --git a/lib/libc/arch/x86_64/string/Makefile.inc b/lib/libc/arch/x86_64/string/Makefile.inc
index 22831f487108..1bd168e14e43 100644
--- a/lib/libc/arch/x86_64/string/Makefile.inc
+++ b/lib/libc/arch/x86_64/string/Makefile.inc
@@ -1,7 +1,7 @@
-#	$NetBSD: Makefile.inc,v 1.6 2013/11/24 03:50:17 christos Exp $
+#	$NetBSD: Makefile.inc,v 1.7 2020/01/27 22:08:08 ad Exp $
 
 # objects built from assembler sources
-SRCS+=	bcmp.S bcopy.S ffs.S memchr.S memcmp.S \
+SRCS+=	bcopy.S ffs.S memchr.S  \
 	memcpy.S memmove.S memset.S strcat.S strchr.S \
 	strcmp.S strcpy.S strlen.S strncmp.S strrchr.S swab.S
 NO_SRCS+= bzero.c