diff --git a/arch/mips/lib/memset.S b/arch/mips/lib/memset.S
index 8f0019a2e5c8..18a1ccd4d134 100644
--- a/arch/mips/lib/memset.S
+++ b/arch/mips/lib/memset.S
@@ -228,10 +228,12 @@
 	.hidden __memset
 	.endif
 
+#ifdef CONFIG_CPU_MIPSR6
 .Lbyte_fixup\@:
 	PTR_SUBU	a2, $0, t0
 	jr		ra
 	 PTR_ADDIU	a2, 1
+#endif /* CONFIG_CPU_MIPSR6 */
 
 .Lfirst_fixup\@:
 	jr	ra