diff --git a/convolution_kernel.cc b/convolution_kernel.cc
index 8383e9a..5a40dfe 100644
--- a/convolution_kernel.cc
+++ b/convolution_kernel.cc
@@ -30,7 +30,7 @@ namespace convolution{
 	template< typename real_t >
 	void perform( kernel * pk, void *pd, bool shift )
 	{
-		return;
+		//return;
 		
 		parameters cparam_ = pk->cparam_;
 		double fftnorm = pow(2.0*M_PI,1.5)/sqrt(cparam_.lx*cparam_.ly*cparam_.lz)/sqrt((double)cparam_.nx*(double)cparam_.ny*(double)cparam_.nz);