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-rw-r--r--include/rtthread.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/rtthread.h b/include/rtthread.h
index 955ea51c50..04db77da46 100644
--- a/include/rtthread.h
+++ b/include/rtthread.h
@@ -378,8 +378,8 @@ rt_mq_t rt_mq_create(const char *name,
rt_uint8_t flag);
rt_err_t rt_mq_delete(rt_mq_t mq);
-rt_err_t rt_mq_send(rt_mq_t mq, void *buffer, rt_size_t size);
-rt_err_t rt_mq_urgent(rt_mq_t mq, void *buffer, rt_size_t size);
+rt_err_t rt_mq_send(rt_mq_t mq, const void *buffer, rt_size_t size);
+rt_err_t rt_mq_urgent(rt_mq_t mq, const void *buffer, rt_size_t size);
rt_err_t rt_mq_recv(rt_mq_t mq,
void *buffer,
rt_size_t size,