diff --git a/arch/loongarch/kernel/legacy_boot.c b/arch/loongarch/kernel/legacy_boot.c
index 204b33109f37..3701bff3884f 100644
--- a/arch/loongarch/kernel/legacy_boot.c
+++ b/arch/loongarch/kernel/legacy_boot.c
@@ -684,7 +684,7 @@ static __initconst const struct {
 	},
 };
 
-void __init acpi_arch_init (){
+void __init acpi_arch_init (void){
 	if (bpi_version == BPI_VERSION_NONE) {
 		return;
 	}