diff --git a/src/USER-MISC/dihedral_fourier.h b/src/USER-MISC/dihedral_fourier.h
index 4229f494c269ac8cef6c2044bd4e19bb6795e5f1..4cdb7f222621666624816bcc89ab65d0562a3d58 100644
--- a/src/USER-MISC/dihedral_fourier.h
+++ b/src/USER-MISC/dihedral_fourier.h
@@ -33,6 +33,7 @@ class DihedralFourier : public Dihedral {
   void coeff(int, char **);
   void write_restart(FILE *);
   void read_restart(FILE *);
+  void write_data(FILE *);
 
  protected:
   double **k,**cos_shift,**sin_shift,**shift;