From 71ff2cfbcd5a55d7cea3c2a793d6e0825fa43759 Mon Sep 17 00:00:00 2001
From: Scott Lahteine <thinkyhead@users.noreply.github.com>
Date: Wed, 28 Oct 2020 16:18:41 -0500
Subject: [PATCH] Restore senseless #undef

---
 Marlin/src/inc/SanityCheck.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Marlin/src/inc/SanityCheck.h b/Marlin/src/inc/SanityCheck.h
index 45cda8081c..f07445f156 100644
--- a/Marlin/src/inc/SanityCheck.h
+++ b/Marlin/src/inc/SanityCheck.h
@@ -879,6 +879,7 @@ static_assert(Y_MAX_LENGTH >= Y_BED_SIZE, "Movement bounds (Y_MIN_POS, Y_MAX_POS
  */
 #if HAS_PRUSA_MMU2
   #if EXTRUDERS != 5
+    #undef SINGLENOZZLE
     #error "PRUSA_MMU2(S) requires exactly 5 EXTRUDERS. Please update your Configuration."
   #elif DISABLED(NOZZLE_PARK_FEATURE)
     #error "PRUSA_MMU2(S) requires NOZZLE_PARK_FEATURE. Enable it to continue."