did i forgot to push?

src/fsfw_hal/linux/serial/helper.cpp

@@ -1,5 +1,7 @@
 #include <fsfw_hal/linux/serial/helper.h>
 #include <sys/ioctl.h>
+#include <termios.h>
+
 #include "FSFWConfig.h"
 #include "fsfw/serviceinterface.h"
 
@@ -164,4 +166,6 @@ void serial::setStopbits(struct termios& options, StopBits bits) {
 
 void serial::flushRxBuf(int fd) { tcflush(fd, TCIFLUSH); }
 
+void serial::flushTxBuf(int fd) { tcflush(fd, TCOFLUSH); }
+
 void serial::flushTxRxBuf(int fd) { tcflush(fd, TCIOFLUSH); }

src/fsfw_hal/linux/serial/helper.h

@@ -65,6 +65,7 @@ void setParity(struct termios& options, Parity parity);
 void ignoreCtrlLines(struct termios& options);
 
 void flushRxBuf(int fd);
+void flushTxBuf(int fd);
 void flushTxRxBuf(int fd);
 
 int readCountersAndErrors(int serialPort, serial_icounter_struct& icounter);