From 92754080f33a41bfa71be110f141cff3662b58cc Mon Sep 17 00:00:00 2001
From: Ivo Pischner <ivo.pischner@gmx.de>
Date: Tue, 27 Oct 2020 13:17:25 +0100
Subject: [PATCH] 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 e21c50126..3773436ad 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