diff --git a/cura/BuildVolume.py b/cura/BuildVolume.py
index b5013c7bc1..038d0e9791 100755
--- a/cura/BuildVolume.py
+++ b/cura/BuildVolume.py
@@ -736,7 +736,7 @@ class BuildVolume(SceneNode):
         # Add prime tower location as disallowed area.
         if len(used_extruders) > 1: #No prime tower in single-extrusion.
 
-            if len([x for x in used_extruders if x.isEnabled == True]) > 1: #No prime tower if only one extruder is enabled
+            if len([x for x in used_extruders if x.isEnabled]) > 1: #No prime tower if only one extruder is enabled
                 prime_tower_collision = False
                 prime_tower_areas = self._computeDisallowedAreasPrinted(used_extruders)
                 for extruder_id in prime_tower_areas: