diff --git a/src/wavelib.c b/src/wavelib.c
index a7d4ae8..d40f491 100644
--- a/src/wavelib.c
+++ b/src/wavelib.c
@@ -3353,7 +3353,7 @@ void setWTConv(wt_object wt, const char *cmethod) {
 }
 
 double* dwt2(wt2_object wt, double *inp) {
-	double *wavecoeff;
+	double *wavecoeff = NULL;
 	int i, J, iter, N, lp, rows_n, cols_n, rows_i, cols_i;
 	int ir, ic, istride,ostride;
 	int aLL, aLH, aHL, aHH, cdim,clen;
@@ -3504,11 +3504,11 @@ void idwt2(wt2_object wt, double *wavecoeff, double *oup) {
 	int istride, ostride, iter, J;
 	int aLL, aLH, aHL, aHH;
 	double *cL, *cH, *X_lp,*orig;
+	double *out = NULL;
 
 	rows = wt->rows;
 	cols = wt->cols;
 	J = wt->J;
-	double *out;
 	
 
 	if (!strcmp(wt->ext, "per")) {