diff --git a/src/modules/mavlink/mavlink_main.cpp b/src/modules/mavlink/mavlink_main.cpp
index 7a6a2078326..6fa5918fc5b 100644
--- a/src/modules/mavlink/mavlink_main.cpp
+++ b/src/modules/mavlink/mavlink_main.cpp
@@ -1411,7 +1411,7 @@ Mavlink::task_main(int argc, char *argv[])
 	_datarate = 0;
 	_mode = MAVLINK_MODE_NORMAL;
 
-#ifndef __PX4_POSIX
+#ifdef __PX4_NUTTX
 	/* the NuttX optarg handler does not
 	 * ignore argv[0] like the POSIX handler
 	 * does, nor does it deal with non-flag