diff --git a/channels/serial/client/serial_tty.c b/channels/serial/client/serial_tty.c
index b71bd5753..a7d365471 100644
--- a/channels/serial/client/serial_tty.c
+++ b/channels/serial/client/serial_tty.c
@@ -450,6 +450,7 @@ BOOL serial_tty_read(SERIAL_TTY* tty, BYTE* buffer, UINT32* Length)
 
 		tcsetattr(tty->fd, TCSANOW, ptermios);
 		tty->timeout = timeout;
+		free(ptermios);
 	}
 
 	ZeroMemory(buffer, *Length);