diff --git a/src/spicelib/analysis/cktsens.c b/src/spicelib/analysis/cktsens.c
index e55c20d3b..07d51094f 100644
--- a/src/spicelib/analysis/cktsens.c
+++ b/src/spicelib/analysis/cktsens.c
@@ -142,7 +142,7 @@ int sens_sens(CKTcircuit *ckt, int restart)
 		size = SMPmatSize(ckt->CKTmatrix);
 
 		/* Create the perturbation matrix */
-		error = SMPnewMatrix(&delta_Y, size);
+		delta_Y = spCreate(size, 1, &error);
 		if (error)
 			return error;