diff --git a/src/ltc/pk/ecc/ecc_verify_hash.c b/src/ltc/pk/ecc/ecc_verify_hash.c
index d18ef93..d7c14be 100644
--- a/src/ltc/pk/ecc/ecc_verify_hash.c
+++ b/src/ltc/pk/ecc/ecc_verify_hash.c
@@ -76,11 +76,11 @@
    }
    else if (sigformat == LTC_ECCSIG_RFC7518) {
       /* RFC7518 format - raw (r,s) */
-      i = mp_unsigned_bin_size(key->dp.order);
-      if (siglen != (2*i)) {
+      if (siglen % 2) {
          err = CRYPT_INVALID_PACKET;
          goto error;
       }
+      i = siglen / 2;
       if ((err = mp_read_unsigned_bin(r, (unsigned char *)sig,   i)) != CRYPT_OK)                       { goto error; }
       if ((err = mp_read_unsigned_bin(s, (unsigned char *)sig+i, i)) != CRYPT_OK)                       { goto error; }
    }