diff --git a/src/eth/example/KCU105/fpga/rtl/fpga_core.sv b/src/eth/example/KCU105/fpga/rtl/fpga_core.sv
index 6bb5060..c9148ff 100644
--- a/src/eth/example/KCU105/fpga/rtl/fpga_core.sv
+++ b/src/eth/example/KCU105/fpga/rtl/fpga_core.sv
@@ -412,6 +412,7 @@ if (SFP_RATE == 0) begin : sfp_mac
         .GT_TYPE("GTH"),
 
         // PHY parameters
+        .AN_EN(1'b1),
         .DIC_EN(1'b1),
         .PTP_TS_EN(1'b0),
         .PTP_TD_EN(1'b0),
@@ -488,6 +489,17 @@ if (SFP_RATE == 0) begin : sfp_mac
          */
         .m_axis_rx(axis_sfp_rx),
 
+        /*
+         * Autonegotiation
+         */
+        .an_en('{2{1'b1}}),
+        .an_restart('{2{1'b0}}),
+        .an_speedup('{2{1'b0}}),
+        .an_intr(),
+        .an_complete(),
+        .an_adv_ability('{2{16'h0020}}),
+        .an_lp_adv_ability(),
+
         /*
          * PTP clock
          */
diff --git a/src/eth/example/ZCU102/fpga/rtl/fpga_core.sv b/src/eth/example/ZCU102/fpga/rtl/fpga_core.sv
index e1d67b1..2fe12ea 100644
--- a/src/eth/example/ZCU102/fpga/rtl/fpga_core.sv
+++ b/src/eth/example/ZCU102/fpga/rtl/fpga_core.sv
@@ -279,6 +279,7 @@ if (SFP_RATE == 0) begin : sfp_mac
 
         // PHY parameters
         .COMBINED_MAC_PCS(COMBINED_MAC_PCS),
+        .AN_EN(1'b1),
         .DIC_EN(1'b1),
         .PTP_TS_EN(1'b0),
         .PTP_TD_EN(1'b0),
@@ -354,6 +355,17 @@ if (SFP_RATE == 0) begin : sfp_mac
          */
         .m_axis_rx(axis_sfp_rx),
 
+        /*
+         * Autonegotiation
+         */
+        .an_en('{4{1'b1}}),
+        .an_restart('{4{1'b0}}),
+        .an_speedup('{4{1'b0}}),
+        .an_intr(),
+        .an_complete(),
+        .an_adv_ability('{4{16'h0020}}),
+        .an_lp_adv_ability(),
+
         /*
          * PTP clock
          */
diff --git a/src/eth/example/ZCU106/fpga/rtl/fpga_core.sv b/src/eth/example/ZCU106/fpga/rtl/fpga_core.sv
index 5b6b08c..5b22253 100644
--- a/src/eth/example/ZCU106/fpga/rtl/fpga_core.sv
+++ b/src/eth/example/ZCU106/fpga/rtl/fpga_core.sv
@@ -279,6 +279,7 @@ if (SFP_RATE == 0) begin : sfp_mac
 
         // PHY parameters
         .COMBINED_MAC_PCS(COMBINED_MAC_PCS),
+        .AN_EN(1'b1),
         .DIC_EN(1'b1),
         .PTP_TS_EN(1'b0),
         .PTP_TD_EN(1'b0),
@@ -355,6 +356,17 @@ if (SFP_RATE == 0) begin : sfp_mac
          */
         .m_axis_rx(axis_sfp_rx),
 
+        /*
+         * Autonegotiation
+         */
+        .an_en('{2{1'b1}}),
+        .an_restart('{2{1'b0}}),
+        .an_speedup('{2{1'b0}}),
+        .an_intr(),
+        .an_complete(),
+        .an_adv_ability('{2{16'h0020}}),
+        .an_lp_adv_ability(),
+
         /*
          * PTP clock
          */