diff --git a/src/modules/mavlink/mavlink_shell.cpp b/src/modules/mavlink/mavlink_shell.cpp
index f0feafa623..e566741f05 100644
--- a/src/modules/mavlink/mavlink_shell.cpp
+++ b/src/modules/mavlink/mavlink_shell.cpp
@@ -110,8 +110,6 @@ int MavlinkShell::start()
 #ifdef __PX4_NUTTX
 	sched_lock();
 #endif /* __PX4_NUTTX */
-	fflush(stdout);
-	fflush(stderr);
 
 	int fd_backups[2]; //we don't touch stderr, we will redirect it to stdout in the startup of the shell task