diff --git a/quartus/soc_system.qsf b/quartus/soc_system.qsf
index e3afa4e9776e037929a3ccda2f54617b471ebb7d..440287f51cb8026b0f914b3c02f3c967b4a68683 100644
--- a/quartus/soc_system.qsf
+++ b/quartus/soc_system.qsf
@@ -99,8 +99,13 @@ set_location_assignment PIN_N2 -to eneta_intn
 set_location_assignment PIN_AG33 -to eneta_rx_p
 set_location_assignment PIN_AK39 -to eneta_tx_p
 
-#set_instance_assignment -name IO_STANDARD LVDS -to enetb_tx_p
-#set_instance_assignment -name IO_STANDARD LVDS -to enetb_rx_p
+set_instance_assignment -name IO_STANDARD "1.8 V" -to eneta_intn
+set_instance_assignment -name IO_STANDARD "1.8 V" -to eneta_resetn
+set_instance_assignment -name IO_STANDARD "1.8 V" -to eneta_mdc
+set_instance_assignment -name IO_STANDARD "1.8 V" -to eneta_mdio
+
+#set_instance_assignment -name IO_STANDARD LVDS -to eneta_tx_p
+#set_instance_assignment -name IO_STANDARD LVDS -to eneta_rx_p
 
 # ETH 2
 set_location_assignment PIN_AV17 -to enetb_mdc