diff --git a/arch/mips/loongson64/init.c b/arch/mips/loongson64/init.c
index 5f73f8663ab2..c7cc5a3d7817 100644
--- a/arch/mips/loongson64/init.c
+++ b/arch/mips/loongson64/init.c
@@ -7,6 +7,7 @@
 #include <linux/irqchip.h>
 #include <linux/logic_pio.h>
 #include <linux/memblock.h>
+#include <linux/minmax.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <asm/bootinfo.h>
@@ -227,3 +228,8 @@ void __init arch_init_irq(void)
 	reserve_pio_range();
 	irqchip_init();
 }
+
+unsigned int arch_dynirq_lower_bound(unsigned int from)
+{
+	return MAX(from, NR_IRQS_LEGACY);
+}