diff --git a/wled00/FX_fcn.cpp b/wled00/FX_fcn.cpp
index 12d86af117..1fca1a94a9 100644
--- a/wled00/FX_fcn.cpp
+++ b/wled00/FX_fcn.cpp
@@ -318,7 +318,7 @@ void Segment::stopTransition() {
 }
 
 // transition progression between 0-65535
-void Segment::updateTransitionProgress() {
+inline void Segment::updateTransitionProgress() {
   _transitionprogress = 0xFFFFU;
   if (isInTransition()) {
     unsigned diff = millis() - _t->_start;