diff --git a/src/EXTRA-COMPUTE/compute_stress_mop.h b/src/EXTRA-COMPUTE/compute_stress_mop.h
index c9f95c1996..d1074e002a 100644
--- a/src/EXTRA-COMPUTE/compute_stress_mop.h
+++ b/src/EXTRA-COMPUTE/compute_stress_mop.h
@@ -39,12 +39,14 @@ class ComputeStressMop : public Compute {
  private:
   void compute_pairs();
   void compute_bonds();
+  void compute_angles();
 
   int me, nvalues, dir;
   int *which;
 
   double *values_local, *values_global;
   double *bond_local, *bond_global;
+  double *angle_local, *angle_global;
   double pos, pos1, dt, nktv2p, ftm2v;
   double area;
   class NeighList *list;