diff --git a/target/linux/realtek/files-5.15/drivers/net/dsa/rtl83xx/dsa.c b/target/linux/realtek/files-5.15/drivers/net/dsa/rtl83xx/dsa.c
index 063ce9b8c5d..d246e60cb2a 100644
--- a/target/linux/realtek/files-5.15/drivers/net/dsa/rtl83xx/dsa.c
+++ b/target/linux/realtek/files-5.15/drivers/net/dsa/rtl83xx/dsa.c
@@ -854,8 +854,11 @@ static void rtl93xx_phylink_mac_config(struct dsa_switch *ds, int port,
 	case SPEED_1000:
 		reg |= 2 << 3;
 		break;
+	case SPEED_100:
+		reg |= 1 << 3;
+		break;
 	default:
-		reg |= 2 << 3;
+		/* Also covers 10M */
 		break;
 	}