diff --git a/libraries/AP_SerialManager/AP_SerialManager.cpp b/libraries/AP_SerialManager/AP_SerialManager.cpp
index 94b81e8d89..449d0236da 100644
--- a/libraries/AP_SerialManager/AP_SerialManager.cpp
+++ b/libraries/AP_SerialManager/AP_SerialManager.cpp
@@ -21,8 +21,8 @@
   find which serial port they should use
  */
 
-#include <AP_HAL.h>
-#include <AP_SerialManager.h>
+#include <AP_HAL/AP_HAL.h>
+#include "AP_SerialManager.h"
 
 extern const AP_HAL::HAL& hal;
 
diff --git a/libraries/AP_SerialManager/AP_SerialManager.h b/libraries/AP_SerialManager/AP_SerialManager.h
index 7c4da16492..a2d0f12cc9 100644
--- a/libraries/AP_SerialManager/AP_SerialManager.h
+++ b/libraries/AP_SerialManager/AP_SerialManager.h
@@ -24,10 +24,10 @@
 #ifndef _AP_SERIALMANAGER_
 #define _AP_SERIALMANAGER_
 
-#include <AP_Math.h>
-#include <AP_Common.h>
-#include <AP_HAL.h>
-#include <GCS_MAVLink.h>
+#include <AP_Math/AP_Math.h>
+#include <AP_Common/AP_Common.h>
+#include <AP_HAL/AP_HAL.h>
+#include <GCS_MAVLink/GCS_MAVLink.h>
 
 #define SERIALMANAGER_NUM_PORTS 5