diff --git a/PWGEM/PhotonMeson/Utils/NMHistograms.h b/PWGEM/PhotonMeson/Utils/NMHistograms.h
index bff50548e9d..d7c87380417 100644
--- a/PWGEM/PhotonMeson/Utils/NMHistograms.h
+++ b/PWGEM/PhotonMeson/Utils/NMHistograms.h
@@ -29,6 +29,7 @@
 #include <TPDGCode.h>
 #include <TString.h>
 
+#include <array>
 #include <vector>
 
 namespace o2::aod::pwgem::photonmeson::utils::nmhistogram