diff --git a/Modules/Radiometry/SARCalibration/include/otbSarRadiometricCalibrationFunction.h b/Modules/Radiometry/SARCalibration/include/otbSarRadiometricCalibrationFunction.h
index 32799f20d870082da2e4b92214439843e10f961b..1331f740d5e4991b9d77d540019f003922baf2a6 100644
--- a/Modules/Radiometry/SARCalibration/include/otbSarRadiometricCalibrationFunction.h
+++ b/Modules/Radiometry/SARCalibration/include/otbSarRadiometricCalibrationFunction.h
@@ -18,10 +18,9 @@
 #ifndef __otbSarRadiometricCalibrationFunction_h
 #define __otbSarRadiometricCalibrationFunction_h
 
-#include "otbSarRadiometricCalibrationFunctor.h"
 #include "otbSarParametricMapFunction.h"
 #include "otbSarCalibrationLookupData.h"
-
+#include "otbMath.h"
 namespace otb
 {
 /**