diff --git a/configs/alt_defconfig b/configs/alt_defconfig
index 109b1ab..1a4c226 100644
--- a/configs/alt_defconfig
+++ b/configs/alt_defconfig
@@ -24,6 +24,7 @@
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_BAR=y
 CONFIG_SPI_FLASH_SPANSION=y
+CONFIG_PHYLIB=y
 CONFIG_BAUDRATE=38400
 CONFIG_SCIF_CONSOLE=y
 CONFIG_USB=y