diff --git a/fpga/mqnic/DE10_Agilex/fpga_100g/rtl/fpga.v b/fpga/mqnic/DE10_Agilex/fpga_100g/rtl/fpga.v
index d1edbd1f0..3429793f1 100644
--- a/fpga/mqnic/DE10_Agilex/fpga_100g/rtl/fpga.v
+++ b/fpga/mqnic/DE10_Agilex/fpga_100g/rtl/fpga.v
@@ -209,7 +209,7 @@ parameter TX_SEQ_NUM_WIDTH = 6;
 parameter PCIE_TAG_COUNT = 256;
 
 // Ethernet interface configuration
-parameter AXIS_ETH_DATA_WIDTH = 512;
+parameter AXIS_ETH_DATA_WIDTH = MAC_100G ? 512 : 64;
 parameter AXIS_ETH_KEEP_WIDTH = AXIS_ETH_DATA_WIDTH/8;
 parameter AXIS_ETH_SYNC_DATA_WIDTH = AXIS_ETH_DATA_WIDTH*(AXIS_ETH_SYNC_DATA_WIDTH_DOUBLE && !MAC_100G ? 2 : 1);
 parameter AXIS_ETH_TX_USER_WIDTH = TX_TAG_WIDTH + 1;
diff --git a/fpga/mqnic/DK_DEV_1SDX_P_A/fpga_100g/rtl/fpga.v b/fpga/mqnic/DK_DEV_1SDX_P_A/fpga_100g/rtl/fpga.v
index 29b89a662..5a83dcd3a 100644
--- a/fpga/mqnic/DK_DEV_1SDX_P_A/fpga_100g/rtl/fpga.v
+++ b/fpga/mqnic/DK_DEV_1SDX_P_A/fpga_100g/rtl/fpga.v
@@ -202,7 +202,7 @@ parameter TX_SEQ_NUM_WIDTH = 6;
 parameter PCIE_TAG_COUNT = 256;
 
 // Ethernet interface configuration
-parameter AXIS_ETH_DATA_WIDTH = 512;
+parameter AXIS_ETH_DATA_WIDTH = MAC_100G ? 512 : 64;
 parameter AXIS_ETH_KEEP_WIDTH = AXIS_ETH_DATA_WIDTH/8;
 parameter AXIS_ETH_SYNC_DATA_WIDTH = AXIS_ETH_DATA_WIDTH*(AXIS_ETH_SYNC_DATA_WIDTH_DOUBLE && !MAC_100G ? 2 : 1);
 parameter AXIS_ETH_TX_USER_WIDTH = TX_TAG_WIDTH + 1;
diff --git a/fpga/mqnic/DK_DEV_AGF014EA/fpga_100g/rtl/fpga.v b/fpga/mqnic/DK_DEV_AGF014EA/fpga_100g/rtl/fpga.v
index e1ab6526d..2242cd583 100644
--- a/fpga/mqnic/DK_DEV_AGF014EA/fpga_100g/rtl/fpga.v
+++ b/fpga/mqnic/DK_DEV_AGF014EA/fpga_100g/rtl/fpga.v
@@ -216,7 +216,7 @@ parameter TX_SEQ_NUM_WIDTH = 6;
 parameter PCIE_TAG_COUNT = 256;
 
 // Ethernet interface configuration
-parameter AXIS_ETH_DATA_WIDTH = 512;
+parameter AXIS_ETH_DATA_WIDTH = MAC_100G ? 512 : 64;
 parameter AXIS_ETH_KEEP_WIDTH = AXIS_ETH_DATA_WIDTH/8;
 parameter AXIS_ETH_SYNC_DATA_WIDTH = AXIS_ETH_DATA_WIDTH*(AXIS_ETH_SYNC_DATA_WIDTH_DOUBLE && !MAC_100G ? 2 : 1);
 parameter AXIS_ETH_TX_USER_WIDTH = TX_TAG_WIDTH + 1;