diff --git a/Modules/Applications/AppIndices/app/otbRadiometricIndices.cxx b/Modules/Applications/AppIndices/app/otbRadiometricIndices.cxx
index 01cd53568d70f6403bc9c7d4ef5bba3f21609fa9..4c89da6e583a17af53c7494811f5aeb3126bafd7 100644
--- a/Modules/Applications/AppIndices/app/otbRadiometricIndices.cxx
+++ b/Modules/Applications/AppIndices/app/otbRadiometricIndices.cxx
@@ -214,7 +214,7 @@ private:
             }
           else
             {
-              indicesMap[band] = idx;
+              indicesMap[band] = idx-1;
             }
         }
     };