diff --git a/soem/ethercatmain.c b/soem/ethercatmain.c
index da21649..c922ca5 100644
--- a/soem/ethercatmain.c
+++ b/soem/ethercatmain.c
@@ -2824,7 +2824,7 @@ int ec_mbxsend(uint16 slave,ec_mbxbuft *mbx, int timeout)
  * @return Work counter (>0 is success)
  * @see ecx_mbxreceive
  */
-int ec_mbxreceive(uint16 slave, ec_mbxbuft *mbx, int timeout)
+int ec_mbxreceive(uint16 slave, ec_mbxbuft **mbx, int timeout)
 {
    return ecx_mbxreceive (&ecx_context, slave, mbx, timeout);
 }
diff --git a/soem/ethercatmain.h b/soem/ethercatmain.h
index 205a33d..0bad8ac 100644
--- a/soem/ethercatmain.h
+++ b/soem/ethercatmain.h
@@ -558,7 +558,7 @@ int ec_writestate(uint16 slave);
 uint16 ec_statecheck(uint16 slave, uint16 reqstate, int timeout);
 int ec_mbxempty(uint16 slave, int timeout);
 int ec_mbxsend(uint16 slave,ec_mbxbuft *mbx, int timeout);
-int ec_mbxreceive(uint16 slave, ec_mbxbuft *mbx, int timeout);
+int ec_mbxreceive(uint16 slave, ec_mbxbuft **mbx, int timeout);
 void ec_esidump(uint16 slave, uint8 *esibuf);
 uint32 ec_readeeprom(uint16 slave, uint16 eeproma, int timeout);
 int ec_writeeeprom(uint16 slave, uint16 eeproma, uint16 data, int timeout);