From a9926b71a461f2bc800207ab7b9df275c1e0c833 Mon Sep 17 00:00:00 2001
From: Scott Lahteine <sourcetree@thinkyhead.com>
Date: Tue, 17 May 2016 16:57:12 -0700
Subject: [PATCH] Require homing of Z before G29

---
 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 e0191a292e..4ae097833b 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -3176,7 +3176,7 @@ inline void gcode_G28() {
     #endif
 
     // Don't allow auto-leveling without homing first
-    if (!axis_homed[X_AXIS] || !axis_homed[Y_AXIS]) {
+    if (!axis_homed[X_AXIS] || !axis_homed[Y_AXIS] || !axis_homed[Z_AXIS]) {
       axis_unhomed_error();
       return;
     }