diff --git a/src/estimator_process.cpp b/src/estimator_process.cpp
index a563dcbd..066df174 100644
--- a/src/estimator_process.cpp
+++ b/src/estimator_process.cpp
@@ -1,6 +1,7 @@
 // 3rdparty
 #include "opencv2/highgui/highgui.hpp"
 // xivo
+#include "estimator.h"
 #include "estimator_process.h"
 #include "tracker.h"
 #include "visualize.h"
diff --git a/src/tracker.cpp b/src/tracker.cpp
index 31dae481..00ebd7c8 100644
--- a/src/tracker.cpp
+++ b/src/tracker.cpp
@@ -6,6 +6,7 @@
 #include "glog/logging.h"
 #include "opencv2/video/video.hpp"
 #include "opencv2/xfeatures2d.hpp"
+//#include "opencv2/features2d.hpp"
 
 #include "feature.h"
 #include "tracker.h"
@@ -59,6 +60,7 @@ Tracker::Tracker(const Json::Value &cfg) : cfg_{cfg} {
                                 detector_cfg.get("edgeThreshold", 31).asInt(),
                                 detector_cfg.get("firstLevel", 0).asInt(),
                                 detector_cfg.get("WTA_K", 2).asInt(),
+				cv::ORB::HARRIS_SCORE,
                                 detector_cfg.get("patchSize", 31).asInt(),
                                 detector_cfg.get("fastThreshold", 20).asInt());
   } else if (detector_type == "AGAST") {
diff --git a/src/viewer.cpp b/src/viewer.cpp
index 60a798fd..71a8cf4f 100644
--- a/src/viewer.cpp
+++ b/src/viewer.cpp
@@ -2,6 +2,7 @@
 // Author: Xiaohan Fei (feixh@cs.ucla.edu)
 #include "glog/logging.h"
 #include "opencv2/imgproc/imgproc.hpp"
+#include "opencv2/imgproc/types_c.h"
 #include "json/json.h"
 
 #include "core.h"
diff --git a/src/visualize.cpp b/src/visualize.cpp
index 1c3d7b20..d52dc6fa 100644
--- a/src/visualize.cpp
+++ b/src/visualize.cpp
@@ -2,6 +2,8 @@
 // info on input images.
 // Author: Xiaohan Fei (feixh@cs.ucla.edu)
 #include "opencv2/imgproc/imgproc.hpp"
+#include "opencv2/imgproc/types_c.h"
+#include "opencv2/imgproc/imgproc_c.h"
 
 #include "feature.h"
 #include "visualize.h"