diff --git a/wled00/FX_fcn.cpp b/wled00/FX_fcn.cpp
index 433c828a78..0c493f23a4 100644
--- a/wled00/FX_fcn.cpp
+++ b/wled00/FX_fcn.cpp
@@ -696,7 +696,7 @@ uint16_t Segment::virtualLength() const {
   return vLength;
 }
 
-void IRAM_ATTR_YN Segment::setPixelColor(int i, uint32_t col)
+void IRAM_ATTR_YN Segment::setPixelColor(int i, uint32_t col) const
 {
   if (!isActive() || i < 0) return; // not active or invalid index
 #ifndef WLED_DISABLE_2D