diff --git a/qcom/sdxlemur-512mb.dtsi b/qcom/sdxlemur-512mb.dtsi
index 4e48c97523d0..29098f1f0707 100644
--- a/qcom/sdxlemur-512mb.dtsi
+++ b/qcom/sdxlemur-512mb.dtsi
@@ -46,6 +46,11 @@
 		reg = <0x8fced000 0x10000>;
 	};
 
+	tz_heap_mem: tz_heap_region@8fcad000 {
+		no-map;
+		reg = <0x8fcad000 0x40000>;
+	};
+
 	mpss_dsm: mpss_dsm_region@8c400000 {
 		no-map;
 		reg = <0x8c400000 0x3200000>;