diff --git a/applications/utilities/cfdemPostproc/cfdemPostproc.C b/applications/utilities/cfdemPostproc/cfdemPostproc.C
index 712b7bae..e3443071 100644
--- a/applications/utilities/cfdemPostproc/cfdemPostproc.C
+++ b/applications/utilities/cfdemPostproc/cfdemPostproc.C
@@ -65,14 +65,14 @@ int main(int argc, char *argv[])
     int DEM_dump_Interval(particleCloud.couplingProperties().lookupOrDefault<int>("dumpInterval",1000));
     particleCloud.reAllocArrays();
 
-    double **positions_;
-    double **velocities_;
-    double **radii_;
-    double **voidfractions_;
-    double **particleWeights_;
-    double **particleVolumes_;
-    double **particleV_;
-    int **cellIDs_;
+    double **positions_=NULL;
+    double **velocities_=NULL;
+    double **radii_=NULL;
+    double **voidfractions_=NULL;
+    double **particleWeights_=NULL;
+    double **particleVolumes_=NULL;
+    double **particleV_=NULL;
+    int **cellIDs_=NULL;
 
     particleCloud.dataExchangeM().allocateArray(positions_,0.,3);
     particleCloud.dataExchangeM().allocateArray(velocities_,0.,3);