diff --git a/drivers/MbedCRC.h b/drivers/MbedCRC.h
index fd4fa1c7f0..66dc98091d 100644
--- a/drivers/MbedCRC.h
+++ b/drivers/MbedCRC.h
@@ -258,6 +258,7 @@ public:
      *  This API is used to perform final computation to get correct CRC value.
      *
      *  @param crc  CRC result
+     *  @return  0  on success or a negative in case of failure
      */
     int32_t compute_partial_stop(uint32_t *crc)
     {