diff --git a/Src/CanSerialPortFrame.c b/Src/CanSerialPortFrame.c
index 6876b1f..d90a0da 100644
--- a/Src/CanSerialPortFrame.c
+++ b/Src/CanSerialPortFrame.c
@@ -477,8 +477,6 @@ uint16_t vCanSerialPortFrameTransmit(tCanSerialPortFrameArtery *env, uint8_t *da
 uint16_t vCanSerialPortFrameTransmit(tCanSerialPortFrameArtery *env, uint8_t *data, uint16_t size, uint32_t adr,
                                       uint8_t canType, uint8_t mailBox, uint32_t timeout) {
 
-    configASSERT(mailBox < 3);
-
     if (osMutexAcquire(env->txAccessQueue[mailBox], 1000) == osOK) {
         uint16_t sent = 0;
         uint32_t endMs = SystemGetMs() + timeout;