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
@@ -10,16 +10,16 @@
 	memmove \
 	memrchr \
 	memset \
-	stpcpy \
 	strchr \
 	strchrnul \
 	strcmp \
 	strcpy \
-	strlen \
 	strncmp \
 	strnlen \
 	strrchr
 
+MDSRCS+=	strcat.S 
+
 #
 # Add the above functions. Generate an asm file that includes the needed
 # Arm Optimized Routines file defining the function name to the libc name.
diff --git a/lib/libc/aarch64/string/strcat.S b/lib/libc/aarch64/string/strcat.S
new file mode 100644
--- /dev/null
+++ b/lib/libc/aarch64/string/strcat.S
@@ -0,0 +1,29 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2024 Getz Mikalsen <getz@FreeBSD.org>
+*/
+
+#include <machine/asm.h>
+
+	.weak	strcat
+	.set	strcat, __strcat
+	.text
+
+ENTRY(__strcat)
+	stp	x29, x30, [sp, #-16]!
+	str	x19, [sp, #-16]!	// store preserved registers
+
+	mov	x19, x0			// stash dest for later
+	bl	strlen			// strlen(dest)
+
+	add	x0, x19, x0		// dest + (strlen(dest))
+	bl	stpcpy			// stpcpy(dest + strlen(dest), src)
+
+	mov	x0, x19			// return dest
+
+	ldr	x19, [sp], #16		// load preserved registers
+	ldp	x29, x30, [sp], #16
+	ret
+
+END(__strcat)