diff --git a/src/postProcessing/functionObjects/forces/forces/forces.C b/src/postProcessing/functionObjects/forces/forces/forces.C
index ee739be63e..9830719c86 100644
--- a/src/postProcessing/functionObjects/forces/forces/forces.C
+++ b/src/postProcessing/functionObjects/forces/forces/forces.C
@@ -512,7 +512,6 @@ Foam::forces::forces
     binDx_(0.0),
     binMin_(GREAT),
     binPoints_(),
-    binFormat_("undefined"),
     binCumulative_(true),
     initialised_(false)
 {
@@ -573,7 +572,6 @@ Foam::forces::forces
     binDx_(0.0),
     binMin_(GREAT),
     binPoints_(),
-    binFormat_("undefined"),
     binCumulative_(true),
     initialised_(false)
 {
@@ -702,8 +700,6 @@ void Foam::forces::read(const dictionary& dict)
                     binPoints_[i] = (i + 0.5)*binDir_*binDx_;
                 }
 
-                binDict.lookup("format") >> binFormat_;
-
                 binDict.lookup("cumulative") >> binCumulative_;
 
                 // allocate storage for forces and moments
diff --git a/src/postProcessing/functionObjects/forces/forces/forces.H b/src/postProcessing/functionObjects/forces/forces/forces.H
index ce2bcf4fe7..c104284f0a 100644
--- a/src/postProcessing/functionObjects/forces/forces/forces.H
+++ b/src/postProcessing/functionObjects/forces/forces/forces.H
@@ -208,9 +208,6 @@ protected:
                 //- Bin positions along binDir
                 List<point> binPoints_;
 
-                //- Write format for bin data
-                word binFormat_;
-
                 //- Should bin data be cumulative?
                 bool binCumulative_;