diff --git a/Detectors/ITSMFT/ITS/postprocessing/studies/src/AvgClusSize.cxx b/Detectors/ITSMFT/ITS/postprocessing/studies/src/AvgClusSize.cxx
index eedb9b2331c8c..6d74c48d0f358 100644
--- a/Detectors/ITSMFT/ITS/postprocessing/studies/src/AvgClusSize.cxx
+++ b/Detectors/ITSMFT/ITS/postprocessing/studies/src/AvgClusSize.cxx
@@ -266,7 +266,7 @@ void AvgClusSizeStudy::prepareOutput()
 
 void AvgClusSizeStudy::setStyle()
 {
-  gStyle->SetPalette(kRainbow);
+  gStyle->SetPalette(kRainBow);
   std::vector<int> colors = {1, 2, 3, 4, 6, 7, 41, 47};
   std::vector<int> markers = {2, 3, 4, 5, 25, 26, 27, 28, 32};
   for (int i = 0; i < mAvgClusSizeCEtaVec.size(); i++) {