diff --git a/include/runtime_services/host_realm_managment/host_shared_data.h b/include/runtime_services/host_realm_managment/host_shared_data.h
index fbeb257..4cb3c0a 100644
--- a/include/runtime_services/host_realm_managment/host_shared_data.h
+++ b/include/runtime_services/host_realm_managment/host_shared_data.h
@@ -63,7 +63,7 @@
  */
 enum host_param_index {
 	HOST_CMD_INDEX = 0U,
-	HOST_SLEEP_INDEX
+	HOST_ARG1_INDEX
 };
 
 enum host_call_cmd {
diff --git a/realm/realm_payload_main.c b/realm/realm_payload_main.c
index 586d400..b8c27bd 100644
--- a/realm/realm_payload_main.c
+++ b/realm/realm_payload_main.c
@@ -25,7 +25,7 @@
  */
 static void realm_sleep_cmd(void)
 {
-	uint64_t sleep = realm_shared_data_get_my_host_val(HOST_SLEEP_INDEX);
+	uint64_t sleep = realm_shared_data_get_my_host_val(HOST_ARG1_INDEX);
 
 	realm_printf("Realm: going to sleep for %llums\n", sleep);
 	waitms(sleep);
diff --git a/tftf/tests/runtime_services/realm_payload/host_realm_payload_tests.c b/tftf/tests/runtime_services/realm_payload/host_realm_payload_tests.c
index b2bf475..0732605 100644
--- a/tftf/tests/runtime_services/realm_payload/host_realm_payload_tests.c
+++ b/tftf/tests/runtime_services/realm_payload/host_realm_payload_tests.c
@@ -47,7 +47,7 @@
 		return TEST_RESULT_FAIL;
 	}
 
-	host_shared_data_set_host_val(0U, HOST_SLEEP_INDEX, SLEEP_TIME_MS);
+	host_shared_data_set_host_val(0U, HOST_ARG1_INDEX, SLEEP_TIME_MS);
 	ret1 = host_enter_realm_execute(REALM_SLEEP_CMD, NULL, RMI_EXIT_HOST_CALL, 0U);
 	ret2 = host_destroy_realm();
 
diff --git a/tftf/tests/runtime_services/realm_payload/host_realm_spm.c b/tftf/tests/runtime_services/realm_payload/host_realm_spm.c
index 04c7f7c..64de113 100644
--- a/tftf/tests/runtime_services/realm_payload/host_realm_spm.c
+++ b/tftf/tests/runtime_services/realm_payload/host_realm_spm.c
@@ -232,7 +232,7 @@
 	 * Spin Realm payload for REALM_TIME_SLEEP ms, This ensures secure wdog
 	 * timer triggers during this time.
 	 */
-	host_shared_data_set_host_val(0U, HOST_SLEEP_INDEX, REALM_TIME_SLEEP);
+	host_shared_data_set_host_val(0U, HOST_ARG1_INDEX, REALM_TIME_SLEEP);
 	host_enter_realm_execute(REALM_SLEEP_CMD, &realm_ptr, RMI_EXIT_FIQ, 0U);
 
 	/*