From 23cd54755f1e4ec63d3507a990e3f37d59216729 Mon Sep 17 00:00:00 2001
From: AnHardt <github@kitelab.de>
Date: Thu, 2 Apr 2015 14:50:31 +0200
Subject: [PATCH] Fix typo in Marlin_main.cpp

related to current_position[Z_AXIS] and retract_zlift.

'+ =' -> '+='

Fix for #1786
---
 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 6b41be617..3eda50859 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -1592,7 +1592,7 @@ void refresh_cmd_timeout(void) { previous_millis_cmd = millis(); }
     else {
 
       if (retract_zlift > 0.01) {
-        current_position[Z_AXIS] + =retract_zlift;
+        current_position[Z_AXIS] += retract_zlift;
         #ifdef DELTA
           sync_plan_position_delta();
         #else