diff --git a/components/freemodbus/common/include/esp_modbus_master.h b/components/freemodbus/common/include/esp_modbus_master.h
index bb7dc7a..621348e 100644
--- a/components/freemodbus/common/include/esp_modbus_master.h
+++ b/components/freemodbus/common/include/esp_modbus_master.h
@@ -136,7 +136,6 @@ esp_err_t mbc_master_init(mb_port_type_t port_type, void** handler);
  * @brief Initialize Modbus Master controller interface handle
  *
  * @param[in] handler - pointer to master data structure
- * @return None
  */
 void mbc_master_init_iface(void* handler);
 
diff --git a/components/freemodbus/common/include/esp_modbus_slave.h b/components/freemodbus/common/include/esp_modbus_slave.h
index ed6a12e..fa6a53b 100644
--- a/components/freemodbus/common/include/esp_modbus_slave.h
+++ b/components/freemodbus/common/include/esp_modbus_slave.h
@@ -78,7 +78,6 @@ esp_err_t mbc_slave_init(mb_port_type_t port_type, void** handler);
  * @brief Initialize Modbus Slave controller interface handle
  *
  * @param[in] handler - pointer to slave interface data structure
- * @return None
  */
 void mbc_slave_init_iface(void* handler);