--- trunk/OOPSE-4/src/types/QuarticTorsionType.hpp	2005/04/15 22:04:00	2204
+++ trunk/OOPSE-4/src/types/QuarticTorsionType.hpp	2005/11/16 23:10:02	2448
@@ -82,13 +82,13 @@ namespace oopse {
       k0 = k0_;
     }
 
-    virtual void calcForce(double cosPhi, double sinPhi, double& V, double& dVdPhi){ 
+    virtual void calcForce(double cosPhi, double& V, double& dVdcosPhi){ 
       double cosPhi2 = cosPhi * cosPhi;
       double cosPhi3 = cosPhi2 * cosPhi;
       double cosPhi4 = cosPhi3 * cosPhi;
             
       V =k0_ + k1_ * cosPhi + k2_*cosPhi2 + k3_*cosPhi3 + k4_*cosPhi4;
-      dVdPhi = k1_ + 2.0*k2_ * cosPhi + 3.0 * k3_*cosPhi2 + 4.0*k4_*cosPhi3;            
+      dVdcosPhi = k1_ + 2.0*k2_ * cosPhi + 3.0 * k3_*cosPhi2 + 4.0*k4_*cosPhi3;            
     }        
         
   private: