diff --git a/src/mainboard/lenovo/t520/devicetree.cb b/src/mainboard/lenovo/t520/devicetree.cb
index a1e24d5..9c75231 100644
--- a/src/mainboard/lenovo/t520/devicetree.cb
+++ b/src/mainboard/lenovo/t520/devicetree.cb
@@ -55,7 +55,7 @@
 			register "gen4_dec" = "0x0c06a1"
 
 			# Enable zero-based linear PCIe root port functions
-			register "pcie_port_coalesce" = "1"
+			register "pcie_port_coalesce" = "true"
 
 			register "pcie_hotplug_map" = "{ 0, 0, 0, 1, 0, 0, 0, 0 }"