diff --git a/lib/constraint.c b/lib/constraint.c
index 3e4e3e7..12284b3 100644
--- a/lib/constraint.c
+++ b/lib/constraint.c
@@ -477,6 +477,7 @@ void constraint_lookup_index_for_ipvx(mpz_t ipvx, constraint_t *con,
         mpz_ior(ipvx, con->radix[mpz_get_ui(radix_idx)],
                 radix_offset); // TODO radix_idx is no more than int32
         mpz_clear(radix_offset);
+        mpz_clear(radix_idx);
         return;
     }
     mpz_clear(radix_idx);
diff --git a/src/state.h b/src/state.h
index 9bc41f4..2920fb0 100644
--- a/src/state.h
+++ b/src/state.h
@@ -83,7 +83,7 @@ struct state_conf {
     int rate;
     // rate in bits per second
     uint64_t bandwidth;
-    uint8_t  batch;
+    int      batch;
     int      packet_streams;
     int      num_retries;
     // how many seconds after the termination of the sender will the receiver