diff --git a/net/dns_resolver/dns_key.c b/net/dns_resolver/dns_key.c
index 8324e9f97066..26a9d8434c23 100644
--- a/net/dns_resolver/dns_key.c
+++ b/net/dns_resolver/dns_key.c
@@ -104,7 +104,7 @@ dns_resolver_preparse(struct key_preparsed_payload *prep)
 		const struct dns_server_list_v1_header *v1;
 
 		/* It may be a server list. */
-		if (datalen <= sizeof(*v1))
+		if (datalen < sizeof(*v1))
 			return -EINVAL;
 
 		v1 = (const struct dns_server_list_v1_header *)data;