diff --git a/src/mainboard/siemens/mc_apl1/variants/mc_apl2/devicetree.cb b/src/mainboard/siemens/mc_apl1/variants/mc_apl2/devicetree.cb
index e54444ac65..c362e6c0a9 100644
--- a/src/mainboard/siemens/mc_apl1/variants/mc_apl2/devicetree.cb
+++ b/src/mainboard/siemens/mc_apl1/variants/mc_apl2/devicetree.cb
@@ -5,7 +5,6 @@ chip soc/intel/apollolake
 	end
 
 	register "sci_irq" = "SCIS_IRQ10"
-	register "serirq_mode" = "SERIRQ_CONTINUOUS"
 
 	# Disable all clkreq of PCIe root ports as SMARC interface do not
 	# have this pins.