diff --git a/plat/xilinx/zynqmp/pm_service/pm_api_sys.c b/plat/xilinx/zynqmp/pm_service/pm_api_sys.c
index 5af0163..eac7801 100644
--- a/plat/xilinx/zynqmp/pm_service/pm_api_sys.c
+++ b/plat/xilinx/zynqmp/pm_service/pm_api_sys.c
@@ -391,7 +391,12 @@
 					unsigned int wake,
 					unsigned int enable)
 {
-	return PM_RET_ERROR_NOTSUPPORTED;
+	uint32_t payload[PAYLOAD_ARG_CNT];
+
+	PM_PACK_PAYLOAD5(payload, PM_REGISTER_NOTIFIER,
+			 nid, event, wake, enable);
+
+	return pm_ipi_send(primary_proc, payload);
 }
 
 /**