diff --git a/resources/quality/fast.inst.cfg b/resources/quality/fast.inst.cfg
index 47e064cc6b..743ec93081 100644
--- a/resources/quality/fast.inst.cfg
+++ b/resources/quality/fast.inst.cfg
@@ -17,5 +17,4 @@ cool_min_layer_time = 3
 speed_wall_0 = =math.ceil(speed_print * 40 / 60)
 speed_wall_x = =math.ceil(speed_print * 80 / 60)
 speed_infill = =math.ceil(speed_print * 100 / 60)
-wall_thickness = 1
 speed_topbottom = =math.ceil(speed_print * 30 / 60)