From cf1c57a04d36f91a30ba32449f02c04ad87183a5 Mon Sep 17 00:00:00 2001
From: Scott Lahteine <github@thinkyhead.com>
Date: Wed, 29 Jul 2020 20:43:35 -0500
Subject: [PATCH] Fix UNKNOWN_Z_NO_RAISE in G28

Bug introduced in 73fc0778b86
---
 Marlin/src/gcode/calibrate/G28.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Marlin/src/gcode/calibrate/G28.cpp b/Marlin/src/gcode/calibrate/G28.cpp
index 1fbb3dd35..0b2bb9801 100644
--- a/Marlin/src/gcode/calibrate/G28.cpp
+++ b/Marlin/src/gcode/calibrate/G28.cpp
@@ -312,7 +312,7 @@ void GcodeSuite::G28() {
     #endif
 
     const float z_homing_height =
-      ENABLED(UNKNOWN_Z_NO_RAISE) && TEST(axis_known_position, Z_AXIS)
+      ENABLED(UNKNOWN_Z_NO_RAISE) && !TEST(axis_known_position, Z_AXIS)
         ? 0
         : (parser.seenval('R') ? parser.value_linear_units() : Z_HOMING_HEIGHT);