diff --git a/src/modules/mavlink/mavlink_main.cpp b/src/modules/mavlink/mavlink_main.cpp
index 43acee96f7..026a4d6c98 100644
--- a/src/modules/mavlink/mavlink_main.cpp
+++ b/src/modules/mavlink/mavlink_main.cpp
@@ -474,7 +474,7 @@ Mavlink::get_instance_id()
 	return _instance_id;
 }
 
-const mavlink_channel_t
+mavlink_channel_t
 Mavlink::get_channel()
 {
 	return _channel;
@@ -2109,7 +2109,7 @@ Mavlink::task_main(int argc, char *argv[])
                 write_ptr = (uint8_t*)&msg;
 
                 // Pull a single message from the buffer
-                int read_count = available;
+                size_t read_count = available;
                 if (read_count > sizeof(mavlink_message_t)) {
                     read_count = sizeof(mavlink_message_t);
                 }
diff --git a/src/modules/mavlink/mavlink_main.h b/src/modules/mavlink/mavlink_main.h
index 5f4117ae5f..f94036a17f 100644
--- a/src/modules/mavlink/mavlink_main.h
+++ b/src/modules/mavlink/mavlink_main.h
@@ -213,15 +213,15 @@ public:
 	 */
 	int			enable_flow_control(bool enabled);
 
-	const mavlink_channel_t	get_channel();
+	mavlink_channel_t	get_channel();
 
-	void configure_stream_threadsafe(const char *stream_name, const float rate);
+	void configure_stream_threadsafe(const char *stream_name, float rate);
 
 	bool			_task_should_exit;	/**< if true, mavlink task should exit */
 
 	int			get_mavlink_fd() { return _mavlink_fd; }
 
-	MavlinkStream * get_streams() { return _streams; } const
+	MavlinkStream * get_streams() const { return _streams; }
 
 
 	/* Functions for waiting to start transmission until message received. */
@@ -311,15 +311,15 @@ private:
 
 	pthread_mutex_t		_message_buffer_mutex;
 
-	perf_counter_t		_loop_perf;			/**< loop performance counter */
-	perf_counter_t		_txerr_perf;			/**< TX error counter */
-
 	bool			_param_initialized;
 	param_t			_param_system_id;
 	param_t			_param_component_id;
 	param_t			_param_system_type;
 	param_t			_param_use_hil_gps;
 
+	perf_counter_t		_loop_perf;			/**< loop performance counter */
+	perf_counter_t		_txerr_perf;			/**< TX error counter */
+
 	/**
 	 * Send one parameter.
 	 *
diff --git a/src/modules/mavlink/mavlink_stream.cpp b/src/modules/mavlink/mavlink_stream.cpp
index ed6776e5cc..7279206dbb 100644
--- a/src/modules/mavlink/mavlink_stream.cpp
+++ b/src/modules/mavlink/mavlink_stream.cpp
@@ -44,10 +44,10 @@
 #include "mavlink_main.h"
 
 MavlinkStream::MavlinkStream() :
-	_last_sent(0),
+	next(nullptr),
 	_channel(MAVLINK_COMM_0),
 	_interval(1000000),
-	next(nullptr)
+	_last_sent(0)
 {
 }