diff --git a/arch/arm/boot/dts/dbx5x0.dtsi b/arch/arm/boot/dts/dbx5x0.dtsi
index 04cd525eb870..daedefe23eab 100644
--- a/arch/arm/boot/dts/dbx5x0.dtsi
+++ b/arch/arm/boot/dts/dbx5x0.dtsi
@@ -332,6 +332,7 @@ db8500_esram34_ret_reg: db8500_esram34_ret {
 			ab8500@5 {
 				compatible = "stericsson,ab8500";
 				reg = <5>; /* mailbox 5 is i2c */
+				interrupt-parent = <&intc>;
 				interrupts = <0 40 0x4>;
 				interrupt-controller;
 				#interrupt-cells = <2>;