diff --git a/drivers/net/dsa/yt921x.h b/drivers/net/dsa/yt921x.h
index 555046526669..5f3b99e189c4 100644
--- a/drivers/net/dsa/yt921x.h
+++ b/drivers/net/dsa/yt921x.h
@@ -854,7 +854,7 @@ enum yt921x_fdb_entry_status {
 #define YT921X_PORT_NUM			11
 
 #define yt921x_port_is_internal(port) ((port) < 8)
-#define yt921x_port_is_external(port) (8 <= (port) && (port) < 9)
+#define yt921x_port_is_external(port) ((port) == 8 || (port) == 9)
 
 struct yt921x_mib {
 	u64 rx_broadcast;