diff --git a/demos/ATSAMA5D2/RT-SAMA5D2-XPLAINED-NSEC/tsclient.c b/demos/ATSAMA5D2/RT-SAMA5D2-XPLAINED-NSEC/tsclient.c
index 776d0487e..b6d621b5c 100644
--- a/demos/ATSAMA5D2/RT-SAMA5D2-XPLAINED-NSEC/tsclient.c
+++ b/demos/ATSAMA5D2/RT-SAMA5D2-XPLAINED-NSEC/tsclient.c
@@ -68,7 +68,7 @@ void tsIdle(void) {
  * @param[in] handle        The handle of the service to invoke.
  *                          The handle is obtained by an invoke to discovery
  *                          service.
- * @param[inout] svc_data   Service request data, often a reference to a more
+ * @param[in,out] svc_data  Service request data, often a reference to a more
  *                          complex structure.
  * @param[in] svc_datalen   Size of the svc_data memory area.
  * @param[in] svc_nsec_time The time slice that will be yielded to the lower
diff --git a/demos/ATSAMA5D2/RT-SAMA5D2-XPLAINED-NSEC/tsclient.h b/demos/ATSAMA5D2/RT-SAMA5D2-XPLAINED-NSEC/tsclient.h
index 0bb605950..b0ce522c1 100644
--- a/demos/ATSAMA5D2/RT-SAMA5D2-XPLAINED-NSEC/tsclient.h
+++ b/demos/ATSAMA5D2/RT-SAMA5D2-XPLAINED-NSEC/tsclient.h
@@ -105,7 +105,7 @@ static inline int64_t tsInvoke0(ts_service_t handle, ts_params_area_t data,
  * @param[in] handle        The handle of the service to invoke.
  *                          The handle is obtained by an invoke to discovery
  *                          service.
- * @param[inout] svc_data   Service request data, often a reference to a more
+ * @param[in,out] svc_data  Service request data, often a reference to a more
  *                          complex structure.
  * @param[in] svc_datalen   Size of the svc_data memory area.
  * @param[in] yieldtime     The time yield to SEC service to run, in microsec.