From e068f66c260aa4d8fdd2bfe5c91a3ee9c8726bcd Mon Sep 17 00:00:00 2001
From: "Dirk O. Kaar" <19971886+dok-net@users.noreply.github.com>
Date: Thu, 24 Oct 2019 19:32:45 +0200
Subject: [PATCH] [1.1.x] Fix compiler warning (#15642)

---
 Marlin/planner.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Marlin/planner.cpp b/Marlin/planner.cpp
index e21c50126cb..3773436ad71 100644
--- a/Marlin/planner.cpp
+++ b/Marlin/planner.cpp
@@ -1169,8 +1169,11 @@ void Planner::recalculate() {
  * Maintain fans, paste extruder pressure,
  */
 void Planner::check_axes_activity() {
-  unsigned char axis_active[NUM_AXIS] = { 0 },
-                tail_fan_speed[FAN_COUNT];
+  uint8_t axis_active[NUM_AXIS] = { 0 };
+
+  #if FAN_COUNT > 0
+    uint8_t tail_fan_speed[FAN_COUNT] = { 0 };
+  #endif
 
   #if ENABLED(BARICUDA)
     #if HAS_HEATER_1