diff --git a/Detectors/PHOS/reconstruction/src/CaloRawFitter.cxx b/Detectors/PHOS/reconstruction/src/CaloRawFitter.cxx
index 37ba3ecae7159..aa929f8d6c6e5 100644
--- a/Detectors/PHOS/reconstruction/src/CaloRawFitter.cxx
+++ b/Detectors/PHOS/reconstruction/src/CaloRawFitter.cxx
@@ -13,6 +13,7 @@
 /// \author Dmitri Peresunko
 
 #include <gsl/span>
+#include <cmath>
 
 #include "PHOSReconstruction/CaloRawFitter.h"
 #include "PHOSBase/PHOSSimParams.h"
diff --git a/Detectors/PHOS/reconstruction/src/CaloRawFitterGS.cxx b/Detectors/PHOS/reconstruction/src/CaloRawFitterGS.cxx
index 08c1f7fb14bc1..3ea506cf203aa 100644
--- a/Detectors/PHOS/reconstruction/src/CaloRawFitterGS.cxx
+++ b/Detectors/PHOS/reconstruction/src/CaloRawFitterGS.cxx
@@ -13,6 +13,8 @@
 /// \author Dmitri Peresunko
 
 #include <gsl/span>
+#include <cmath>
+#include <TMath.h>
 
 #include "PHOSReconstruction/CaloRawFitterGS.h"
 #include "PHOSBase/PHOSSimParams.h"