diff --git a/src/mainboard/kontron/ktqm77/devicetree.cb b/src/mainboard/kontron/ktqm77/devicetree.cb
index a878019..31bee5d 100644
--- a/src/mainboard/kontron/ktqm77/devicetree.cb
+++ b/src/mainboard/kontron/ktqm77/devicetree.cb
@@ -32,7 +32,7 @@
 			#register "gen4_dec" = "0x00000000"
 
 			# Disable root port coalescing
-			register "pcie_port_coalesce" = "0"
+			register "pcie_port_coalesce" = "false"
 
 			register "xhci_switchable_ports"	= "0x0f"
 			register "superspeed_capable_ports"	= "0x0f"