diff --git a/tinycrypt/ecc_dsa.c b/tinycrypt/ecc_dsa.c
index 6c171c3..a3b91b8 100644
--- a/tinycrypt/ecc_dsa.c
+++ b/tinycrypt/ecc_dsa.c
@@ -280,7 +280,7 @@
 
 	for (i = num_bits - 2; i >= 0; --i) {
 		uECC_word_t index;
-		curve->double_jacobian(rx, ry, z, curve);
+		double_jacobian_default(rx, ry, z, curve);
 
 		index = (!!uECC_vli_testBit(u1, i)) | ((!!uECC_vli_testBit(u2, i)) << 1);
 		point = points[index];