diff --git a/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi b/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi
index 18c61693529e64104bcfb9d4bba7fd46f8e9940d..0c10bbe5531731b1af902743b90b5b147817037c 100644
--- a/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi
+++ b/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi
@@ -189,9 +189,15 @@
 					regulator-min-microvolt = <1300000>;
 					regulator-max-microvolt = <1300000>;
 				};
+
+				/**
+				 * 1.8v required on LS expansion
+				 * for mezzanine boards
+				 */
 				s4 {
 					regulator-min-microvolt = <1800000>;
 					regulator-max-microvolt = <1800000>;
+					regulator-always-on;
 				};
 				s5 {
 					regulator-min-microvolt = <2150000>;