diff --git a/corelib/include/rtabmap/core/CameraFreenect.h b/corelib/include/rtabmap/core/CameraFreenect.h
index 45e09743..869bb8a9 100644
--- a/corelib/include/rtabmap/core/CameraFreenect.h
+++ b/corelib/include/rtabmap/core/CameraFreenect.h
@@ -14,10 +14,11 @@
 #include <rtabmap/utilite/UEventsSender.h>
 #include <rtabmap/utilite/UThread.h>
 
-#include <libfreenect.h>
 #include <opencv2/opencv.hpp>
 
 class UTimer;
+typedef struct _freenect_context freenect_context;
+typedef struct _freenect_device freenect_device;
 
 namespace rtabmap {
 
diff --git a/corelib/src/CameraFreenect.cpp b/corelib/src/CameraFreenect.cpp
index fffd0fd4..7598e0a5 100644
--- a/corelib/src/CameraFreenect.cpp
+++ b/corelib/src/CameraFreenect.cpp
@@ -13,6 +13,8 @@
 #include <rtabmap/utilite/UEventsManager.h>
 #include <opencv2/imgproc/imgproc.hpp>
 
+#include <libfreenect.h>
+
 namespace rtabmap {
 
 //
diff --git a/guilib/src/MapVisibilityWidget.cpp b/guilib/src/MapVisibilityWidget.cpp
index a3e1d21a..853b17f8 100644
--- a/guilib/src/MapVisibilityWidget.cpp
+++ b/guilib/src/MapVisibilityWidget.cpp
@@ -42,7 +42,7 @@ void MapVisibilityWidget::updateCheckBoxes()
 	QWidget * area = this->findChild<QWidget*>("area");
 	QVBoxLayout * layout = (QVBoxLayout *)area->layout();
 	QList<QCheckBox*> checkboxes = area->findChildren<QCheckBox*>();
-	while(checkboxes.size() && checkboxes.size() > _poses.size())
+	while(checkboxes.size() && checkboxes.size() > (int)_poses.size())
 	{
 		delete *checkboxes.begin();
 		checkboxes.erase(checkboxes.begin());