diff --git a/arch/arc/boot/dts/hsdk.dts b/arch/arc/boot/dts/hsdk.dts
index f67f614ccb0e..d131c54acd3e 100644
--- a/arch/arc/boot/dts/hsdk.dts
+++ b/arch/arc/boot/dts/hsdk.dts
@@ -184,6 +184,9 @@ gmac: ethernet@8000 {
 			mac-address = [00 00 00 00 00 00]; /* Filled in by U-Boot */
 			dma-coherent;
 
+			tx-fifo-depth = <4096>;
+			rx-fifo-depth = <4096>;
+
 			mdio {
 				#address-cells = <1>;
 				#size-cells = <0>;