diff --git a/Src/CanSerialPortFrame.c b/Src/CanSerialPortFrame.c
index 1318108..c2aafcc 100644
--- a/Src/CanSerialPortFrame.c
+++ b/Src/CanSerialPortFrame.c
@@ -108,12 +108,18 @@ void vCanSerialPortFrameInit(
 
     env->can = CANx;
 
-    env->txAccessQueue[0] = osMutexNew(NULL);
-    env->txAccessQueue[1] = osMutexNew(NULL);
-    env->txAccessQueue[2] = osMutexNew(NULL);
-
     if (!env->reInit) {
         env->reInit = true;
+
+        if (env->txAccessQueue[0] == NULL)
+            env->txAccessQueue[0] = osMutexNew(NULL);
+
+        if (env->txAccessQueue[1] == NULL)
+            env->txAccessQueue[1] = osMutexNew(NULL);
+
+        if (env->txAccessQueue[2] == NULL)
+            env->txAccessQueue[2] = osMutexNew(NULL);
+
         vCanSerialPortFrameInitStructure(env, CANx, rxBufferLength0, rxSnifferLength0, rxBufferLength1,
                                          rxSnifferLength1);
 
@@ -479,7 +485,7 @@ 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) {
+                                     uint8_t canType, uint8_t mailBox, uint32_t timeout) {
 
     if (osMutexAcquire(env->txAccessQueue[mailBox], 1000) == osOK) {
         uint16_t sent = 0;