diff --git a/libraries/AP_Winch/AP_Winch.h b/libraries/AP_Winch/AP_Winch.h
index 0e03f7d0a7..81cbca5f73 100644
--- a/libraries/AP_Winch/AP_Winch.h
+++ b/libraries/AP_Winch/AP_Winch.h
@@ -59,7 +59,7 @@ public:
     float get_rate_max() const { return MAX(config.rate_max, 0.0f); }
 
     // send status to ground station
-    void send_status(const GCS_MAVLINK &channel);
+    void send_status(const class GCS_MAVLINK &channel);
 
     // write log
     void write_log();
diff --git a/libraries/AP_Winch/AP_Winch_Backend.cpp b/libraries/AP_Winch/AP_Winch_Backend.cpp
index 9a01999ff4..61e395de01 100644
--- a/libraries/AP_Winch/AP_Winch_Backend.cpp
+++ b/libraries/AP_Winch/AP_Winch_Backend.cpp
@@ -1,5 +1,7 @@
 #include <AP_Winch/AP_Winch_Backend.h>
+
 #include <RC_Channel/RC_Channel.h>
+#include <SRV_Channel/SRV_Channel.h>
 
 // setup rc input and output
 void AP_Winch_Backend::init()
diff --git a/libraries/AP_Winch/AP_Winch_Daiwa.cpp b/libraries/AP_Winch/AP_Winch_Daiwa.cpp
index a213b38907..99f1921578 100644
--- a/libraries/AP_Winch/AP_Winch_Daiwa.cpp
+++ b/libraries/AP_Winch/AP_Winch_Daiwa.cpp
@@ -1,4 +1,6 @@
 #include <AP_Winch/AP_Winch_Daiwa.h>
+
+#include <AP_Logger/AP_Logger.h>
 #include <GCS_MAVLink/GCS.h>
 
 extern const AP_HAL::HAL& hal;
diff --git a/libraries/AP_Winch/AP_Winch_PWM.cpp b/libraries/AP_Winch/AP_Winch_PWM.cpp
index 7a26f931de..afd7d77009 100644
--- a/libraries/AP_Winch/AP_Winch_PWM.cpp
+++ b/libraries/AP_Winch/AP_Winch_PWM.cpp
@@ -1,4 +1,6 @@
 #include "AP_Winch_PWM.h"
+
+#include <AP_Logger/AP_Logger.h>
 #include <GCS_MAVLink/GCS.h>
 
 extern const AP_HAL::HAL& hal;