1 files changed, 2 insertions, 2 deletions
diff --git a/src/argaze/GazeAnalysis/DispersionThresholdIdentification.py b/src/argaze/GazeAnalysis/DispersionThresholdIdentification.py
index bf7b862..85f2fb5 100644
--- a/src/argaze/GazeAnalysis/DispersionThresholdIdentification.py
+++ b/src/argaze/GazeAnalysis/DispersionThresholdIdentification.py
@@ -83,12 +83,12 @@ class Fixation(GazeFeatures.Fixation):
         """
 
         # Draw deviation circle if required
-        if deviation_circle_color:
+        if deviation_circle_color is not None:
 
             cv2.circle(image, (int(self.focus[0]), int(self.focus[1])), int(self.deviation_max), deviation_circle_color, -1)
 
         # Draw duration border if required
-        if duration_border_color:
+        if duration_border_color is not None:
 
             cv2.circle(image, (int(self.focus[0]), int(self.focus[1])), int(self.deviation_max), duration_border_color, int(self.duration * duration_factor))