diff --git a/crypto/bn/exponentiation.c b/crypto/bn/exponentiation.c
index ef18812..9cefa62 100644
--- a/crypto/bn/exponentiation.c
+++ b/crypto/bn/exponentiation.c
@@ -285,10 +285,10 @@
     goto err;
   }
 
-  if (BN_ucmp(m, &(recp->N)) < 0) {
+  if (BN_ucmp(m, &recp->N) < 0) {
     BN_zero(d);
     if (!BN_copy(r, m)) {
-      return 0;
+      goto err;
     }
     BN_CTX_end(ctx);
     return 1;