diff --git a/src/cwt.c b/src/cwt.c
index ac33fd8..1695e5a 100755
--- a/src/cwt.c
+++ b/src/cwt.c
@@ -118,7 +118,7 @@ static void wave_function(int nk, double dt,int mother, double param,double scal
 	}
 }
 
-void cwavelet(const double *y, int N, double dt, int mother, double param, int jtot, int npad,
+void cwavelet(const double *y, int N, double dt, int mother, double param, double s0, double dj, int jtot, int npad,
 	double *wave, double *scale, double *period, double *coi) {
 
 	int i, j, k, iter;
@@ -129,6 +129,8 @@ void cwavelet(const double *y, int N, double dt, int mother, double param, int j
 	fft_object obj, iobj;
 	fft_data *ypad, *yfft,*daughter;
 
+	(void)s0; (void)dj; /* yes, we need these parameters unused */
+
 	pi = 4.0 * atan(1.0);
 
 	if (npad < N) {
@@ -342,7 +344,7 @@ double cdelta(int mother, double param, double psi0 ) {
 		scale[i] = s0*pow(2.0, (double)(i)*dj);
 	}
 
-	cwavelet(delta, N, dt, mother, param, jtot, N, wave, scale, period, coi);
+	cwavelet(delta, N, dt, mother, param, s0, dj, jtot, N, wave, scale, period, coi);
 
 	for (i = 0; i < N; ++i) {
 		mval[i] = 0;
diff --git a/src/cwt.h b/src/cwt.h
index e9a80dc..d1e4a03 100755
--- a/src/cwt.h
+++ b/src/cwt.h
@@ -7,7 +7,7 @@
 extern "C" {
 #endif
 
-void cwavelet(const double *y, int N, double dt, int mother, double param, int jtot, int npad,
+void cwavelet(const double *y, int N, double dt, int mother, double param, double s0, double dj, int jtot, int npad,
 		double *wave, double *scale, double *period, double *coi);
 
 void psi0(int mother, double param, double *val, int *real);
diff --git a/src/wavelib.c b/src/wavelib.c
index 9deb9ea..65a69c0 100644
--- a/src/wavelib.c
+++ b/src/wavelib.c
@@ -1413,7 +1413,7 @@ void cwt(cwt_object wt, const double *inp) {
 	}
 	wt->smean /= N;
 
-	cwavelet(inp, N, wt->dt, wt->mother, wt->m, wt->J,npad,wt->params, wt->params+nj2, wt->params+nj2+j, wt->params+nj2+j2);
+	cwavelet(inp, N, wt->dt, wt->mother, wt->m, wt->s0,wt->dj,wt->J,npad,wt->params, wt->params+nj2, wt->params+nj2+j, wt->params+nj2+j2);
 
 }