--- a/arch/mips/cavium-octeon/executive/cvmx-helper-board.c
+++ b/arch/mips/cavium-octeon/executive/cvmx-helper-board.c
@@ -174,6 +174,8 @@ int cvmx_helper_board_get_mii_address(in
 			return 7 - ipd_port;
 		else
 			return -1;
+	case CVMX_BOARD_TYPE_UBNT_E200:
+		return -1;
 	case CVMX_BOARD_TYPE_KONTRON_S1901:
 		if (ipd_port == CVMX_HELPER_BOARD_MGMT_IPD_PORT)
 			return 1;