diff --git a/lib/libc/aarch64/string/Makefile.inc b/lib/libc/aarch64/string/Makefile.inc
--- a/lib/libc/aarch64/string/Makefile.inc
+++ b/lib/libc/aarch64/string/Makefile.inc
@@ -4,7 +4,6 @@
 #
 
 AARCH64_STRING_FUNCS= \
-	memchr \
 	memcmp \
 	memcpy \
 	memmove \
@@ -19,6 +18,7 @@
 
 # SIMD-enhanced routines not derived from Arm's code
 MDSRCS+= \
+	memchr.S \
 	strcmp.S \
 	strspn.S \
 	strcspn.S \
diff --git a/tools/build/depend-cleanup.sh b/tools/build/depend-cleanup.sh
--- a/tools/build/depend-cleanup.sh
+++ b/tools/build/depend-cleanup.sh
@@ -270,8 +270,9 @@
 	# 20250110  3dc5429158cf  add strncat SIMD implementation
 	clean_dep   lib/libc strncat c
 
-	# 20250110  bea89d038ac5  add strlcat SIMD implementation
+	# 20250110  bea89d038ac5  add strlcat SIMD implementation, and move memchr
 	clean_dep   lib/libc strlcat c
+	run rm -f "$OBJTOP"/lib/libc/memchr.S
 
 	# 20250110  3863fec1ce2d  add strlen SIMD implementation
 	clean_dep   lib/libc strlen S arm-optimized-routines