diff --git a/mainboard/pcengines/alix1c/dts b/mainboard/pcengines/alix1c/dts
index a6b6c4c088..a3eb153c2a 100644
--- a/mainboard/pcengines/alix1c/dts
+++ b/mainboard/pcengines/alix1c/dts
@@ -36,9 +36,9 @@
 			/config/("southbridge/amd/cs5536/dts");
 			/* Interrupt enables for LPC bus.
 			 *  Each bit is an IRQ 0-15. */
-			lpc_serirq_enable = "0x000010da";
+			lpc_serirq_enable = "0x0000105A";
 			/* LPC IRQ polarity. Each bit is an IRQ 0-15. */
-			lpc_serirq_polarity = "0x0000EF25";
+			lpc_serirq_polarity = "0x0000EFA5";
 			/* 0:continuous 1:quiet */
 			lpc_serirq_mode = "1";
 			/* GPIO(0-0x20) for INT D:C:B:A, 0xFF=none. 
diff --git a/mainboard/pcengines/alix2c3/dts b/mainboard/pcengines/alix2c3/dts
index 2a216d123b..1af2944922 100644
--- a/mainboard/pcengines/alix2c3/dts
+++ b/mainboard/pcengines/alix2c3/dts
@@ -34,9 +34,9 @@
 			/config/("southbridge/amd/cs5536/dts");
 			/* Interrupt enables for LPC bus.
 			 *  Each bit is an IRQ 0-15. */
-			lpc_serirq_enable = "0x000010da";
+			lpc_serirq_enable = "0x0000105A";
 			/* LPC IRQ polarity. Each bit is an IRQ 0-15. */
-			lpc_serirq_polarity = "0x0000EF25";
+			lpc_serirq_polarity = "0x0000EFA5";
 			/* 0:continuous 1:quiet */
 			lpc_serirq_mode = "1";
 			/* GPIO(0-0x20) for INT D:C:B:A, 0xFF=none.