diff --git a/tinycrypt/ecc_dsa.c b/tinycrypt/ecc_dsa.c
index 6a93705..1685c20 100644
--- a/tinycrypt/ecc_dsa.c
+++ b/tinycrypt/ecc_dsa.c
@@ -103,7 +103,7 @@
 
 	/* Reduce mod curve_n */
 	if (uECC_vli_cmp_unsafe(curve->n, native) != 1) {
-		uECC_vli_sub(native, native, curve->n, num_n_words);
+		uECC_vli_sub(native, native, curve->n);
 	}
 }
 
@@ -294,7 +294,7 @@
 
 	/* v = x1 (mod n) */
 	if (uECC_vli_cmp_unsafe(curve->n, rx) != 1) {
-		uECC_vli_sub(rx, rx, curve->n, num_n_words);
+		uECC_vli_sub(rx, rx, curve->n);
 	}
 
 	/* Accept only if v == r. */