diff --git a/canny_edge_machine.cpp b/canny_edge_machine.cpp
index eeb7724..dd30b11 100644
--- a/canny_edge_machine.cpp
+++ b/canny_edge_machine.cpp
@@ -202,7 +202,7 @@ class CannyEdgeMachine {
       if(new_dx >= 0 && new_dx >= new_dy) orientation_sector = 0;
       if(new_dx >= 0 && new_dx < new_dy) orientation_sector = 1;
       if(new_dx < 0 && -new_dx < new_dy) orientation_sector = 2;
-      if(new_dx < 0 && -new_dy >= new_dy) orientation_sector = 3;
+      if(new_dx < 0 && -new_dx >= new_dy) orientation_sector = 3;
       return orientation_sector;
     };
     
diff --git a/hough_machine.cpp b/hough_machine.cpp
index b770026..3a8ae1d 100644
--- a/hough_machine.cpp
+++ b/hough_machine.cpp
@@ -166,7 +166,7 @@ class HoughMachine {
       if(new_dx >= 0 && new_dx >= new_dy) orientation_sector = 0;
       if(new_dx >= 0 && new_dx < new_dy) orientation_sector = 1;
       if(new_dx < 0 && -new_dx < new_dy) orientation_sector = 2;
-      if(new_dx < 0 && -new_dy >= new_dy) orientation_sector = 3;
+      if(new_dx < 0 && -new_dx >= new_dy) orientation_sector = 3;
       return orientation_sector;
     };