diff --git a/ocv_corner_tracker.py b/ocv_corner_tracker.py
index 9ee1542..b3c0f4e 100644
--- a/ocv_corner_tracker.py
+++ b/ocv_corner_tracker.py
@@ -182,7 +182,7 @@ class CornerTracker:
 
 		# store refined corners
 		for i in range(corners_refined.shape[0]):
-			line_to = (corners_refined[i, 0, 0], corners_refined[i, 0, 1])
+			line_to = (int(corners_refined[i, 0, 0]), int(corners_refined[i, 0, 1]))
 			ct = self.corner_list[i]
 			ct.path_add(line_to)