From 1b09733e7cc44472a8b8fe2699ee4062bf1fd319 Mon Sep 17 00:00:00 2001
From: Scott Lahteine <github@thinkyhead.com>
Date: Sun, 5 Nov 2017 18:29:00 -0600
Subject: [PATCH] Fix FWRETRACT un-hop

---
 Marlin/Marlin_main.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index aed37731ac4..5e2a26fa391 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -3255,7 +3255,7 @@ static void homeaxis(const AxisEnum axis) {
     else {
       // If a hop was done and Z hasn't changed, undo the Z hop
       if (hop_amount) {
-        current_position[Z_AXIS] -= retract_zlift;          // Pretend current pos is lower. Next move raises Z.
+        current_position[Z_AXIS] += retract_zlift;          // Pretend current pos is lower. Next move raises Z.
         SYNC_PLAN_POSITION_KINEMATIC();                     // Set the planner to the new position
         feedrate_mm_s = planner.max_feedrate_mm_s[Z_AXIS];  // Z feedrate to max
         prepare_move_to_destination();                      // Raise up to the old current pos