diff --git a/buildroot-external/kernel/v6.6.y/device-support-pci.config b/buildroot-external/kernel/v6.6.y/device-support-pci.config
index f35f80ff201..1d408aa227e 100644
--- a/buildroot-external/kernel/v6.6.y/device-support-pci.config
+++ b/buildroot-external/kernel/v6.6.y/device-support-pci.config
@@ -25,6 +25,11 @@ CONFIG_NET_VENDOR_STMICRO=y
 CONFIG_STMMAC_ETH=m
 CONFIG_STMMAC_PCI=m
 
+# Mellanox ConnectX-3 NIC support
+CONFIG_MLX4_EN=m
+# CONFIG_MLX4_DEBUG is not set
+CONFIG_MLX4_CORE_GEN2=y
+
 CONFIG_MEDIA_PCI_SUPPORT=y
 
 # PCI sound drivers