diff --git a/ArbiterCommand.c b/ArbiterCommand.c
index adf3d3a..b3a5966 100644
--- a/ArbiterCommand.c
+++ b/ArbiterCommand.c
@@ -221,13 +221,13 @@ static _Noreturn void Serial_ToCanSpontany_Thread(tTaskSerialToCanSpontany *env)
                     if (data.from_uart == FROM_UART) {
                         env->ioUART->transmit(env->ioUART->env, (uint8_t *) "OK\r\n", sizeof("OK\r\n"), 1000);
                     } else {
-                        env->ioUART->transmit(env->ioUSB->env, (uint8_t *) "OK\r\n", sizeof("OK\r\n"), 1000);
+                        env->ioUSB->transmit(env->ioUSB->env, (uint8_t *) "OK\r\n", sizeof("OK\r\n"), 1000);
                     }
                 } else {
                     if (data.from_uart == FROM_UART) {
                         env->ioUART->transmit(env->ioUART->env, (uint8_t *) "ERROR\r\n", sizeof("ERROR\r\n"), 1000);
                     } else {
-                        env->ioUART->transmit(env->ioUSB->env, (uint8_t *) "ERROR\r\n", sizeof("ERROR\r\n"), 1000);
+                        env->ioUSB->transmit(env->ioUSB->env, (uint8_t *) "ERROR\r\n", sizeof("ERROR\r\n"), 1000);
                     }
                 }
 
@@ -240,13 +240,13 @@ static _Noreturn void Serial_ToCanSpontany_Thread(tTaskSerialToCanSpontany *env)
                     if (data.from_uart == FROM_UART) {
                         env->ioUART->transmit(env->ioUART->env, (uint8_t *) "OK\r\n", sizeof("OK\r\n"), 1000);
                     } else {
-                        env->ioUART->transmit(env->ioUSB->env, (uint8_t *) "OK\r\n", sizeof("OK\r\n"), 1000);
+                        env->ioUSB->transmit(env->ioUSB->env, (uint8_t *) "OK\r\n", sizeof("OK\r\n"), 1000);
                     }
                 } else {
                     if (data.from_uart == FROM_UART) {
                         env->ioUART->transmit(env->ioUART->env, (uint8_t *) "ERROR\r\n", sizeof("ERROR\r\n"), 1000);
                     } else {
-                        env->ioUART->transmit(env->ioUSB->env, (uint8_t *) "ERROR\r\n", sizeof("ERROR\r\n"), 1000);
+                        env->ioUSB->transmit(env->ioUSB->env, (uint8_t *) "ERROR\r\n", sizeof("ERROR\r\n"), 1000);
                     }
                 }