diff --git a/nonclass.h b/nonclass.h
index 24f5503..52b8a4a 100644
--- a/nonclass.h
+++ b/nonclass.h
@@ -9,8 +9,15 @@
 
 //MISC
 export template <class T>
-const NRSMat<T> twoside_transform(const NRSMat<T> &S, const NRMat<T> &C) //calculate C^dagger S C
+const NRSMat<T> twoside_transform(const NRSMat<T> &S, const NRMat<T> &C, bool transp=0) //calculate C^dagger S C
 {
+if(transp)
+	{
+	NRMat<T> tmp =  C * S;
+	NRMat<T> result(C.rows(),C.nrows());
+	result.gemm((T)0,tmp,'n',C,'t',(T)1);
+	return NRSMat<T>(result);
+	}
 NRMat<T> tmp = S * C;
 NRMat<T> result(C.ncols(),C.ncols());
 result.gemm((T)0,C,'t',tmp,'n',(T)1);
@@ -18,16 +25,6 @@ return NRSMat<T>(result);
 }
 
 
-export template <class T>
-const NRSMat<T> twoside_transform_t(const NRSMat<T> &S, const NRMat<T> &C) //calculate C S C^dagger
-{
-NRMat<T> tmp =  C * S;
-NRMat<T> result(C.rows(),C.nrows());
-result.gemm((T)0,tmp,'n',C,'t',(T)1);
-return NRSMat<T>(result);
-}
-
-
 
 
 export template <class T>