diff --git a/Cura/gui/opengl.py b/Cura/gui/opengl.py
index a1fb9754..5c8c3d3c 100644
--- a/Cura/gui/opengl.py
+++ b/Cura/gui/opengl.py
@@ -175,8 +175,8 @@ def DrawMachine(machineSize):
 		glVertex3f(0, machineSize.y, 0)
 		glVertex3f(0, machineSize.y, machineSize.z)
 
-		glVertex3f(machineSize.y, 0, 0)
-		glVertex3f(machineSize.y, 0, machineSize.z)
+		glVertex3f(machineSize.x, 0, 0)
+		glVertex3f(machineSize.x, 0, machineSize.z)
 		glVertex3f(machineSize.x, machineSize.y, machineSize.z)
 		glVertex3f(machineSize.x, machineSize.y, 0)
 		glEnd()