diff --git a/src/mainboard/lenovo/t430/devicetree.cb b/src/mainboard/lenovo/t430/devicetree.cb
index 35c23b8..73fd5b2 100644
--- a/src/mainboard/lenovo/t430/devicetree.cb
+++ b/src/mainboard/lenovo/t430/devicetree.cb
@@ -28,9 +28,11 @@
 			register "pcie_port_coalesce" = "true"
 			register "sata_interface_speed_support" = "0x3"
 			register "sata_port_map" = "0x17"
-			register "superspeed_capable_ports" = "0x0000000f"
+
+			# Do not enable xHCI Port 4 since WWAN USB is EHCI-only
+			register "superspeed_capable_ports" = "0x7"
+			register "xhci_switchable_ports" = "0x7"
 			register "xhci_overcurrent_mapping" = "0x04000201"
-			register "xhci_switchable_ports" = "0x0000000f"
 
 			# device specific SPI configuration
 			register "spi_uvscc" = "0x2005"