diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 9ee73a94b5a9036b0ad5fd492e90dc7065010dcf..3e9c8b0ec6c948c80f78820df05915f74ff2b000 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -4726,7 +4726,7 @@ const struct bpf_func_proto bpf_kallsyms_lookup_name_proto = {
 	.gpl_only	= false,
 	.ret_type	= RET_INTEGER,
 	.arg1_type	= ARG_PTR_TO_MEM,
-	.arg2_type	= ARG_CONST_SIZE,
+	.arg2_type	= ARG_CONST_SIZE_OR_ZERO,
 	.arg3_type	= ARG_ANYTHING,
 	.arg4_type	= ARG_PTR_TO_LONG,
 };