diff --git a/boxes/generators/microrack.py b/boxes/generators/microrack.py
index e237c2f..5eabb8e 100644
--- a/boxes/generators/microrack.py
+++ b/boxes/generators/microrack.py
@@ -132,7 +132,7 @@ class SBCMicroRack(Boxes):
     def paint_stable_features(self):
         if self.stable:
             self.hole(
-                10,10,6.5
+                10, 10, d=6.5
             )
 
     def paint_netusb_holes(self):