diff --git a/lib/bcoin/mempool.js b/lib/bcoin/mempool.js
index f6f472ef..aa171e8b 100644
--- a/lib/bcoin/mempool.js
+++ b/lib/bcoin/mempool.js
@@ -296,6 +296,11 @@ Mempool.prototype.addTX = function addTX(tx, peer, callback, force) {
   callback = utils.wrap(callback, unlock);
   callback = utils.asyncify(callback);
 
+  if (!this.chain.segwitActive) {
+    if (tx.hasWitness())
+      return callback(new VerifyError('nonstandard', 'no-witness-yet', 0));
+  }
+
   if (!this.checkTX(tx, peer))
     return callback(new VerifyError('invalid', 'CheckTransaction failed', -1));
 
@@ -421,9 +426,6 @@ Mempool.prototype.verify = function verify(tx, callback) {
   if (this.chain.segwitActive) {
     flags |= constants.flags.VERIFY_WITNESS;
     mandatory |= constants.flags.VERIFY_WITNESS;
-  } else {
-    if (tx.hasWitness())
-      return callback(new VerifyError('nonstandard', 'no-witness-yet', 0));
   }
 
   if (this.requireStandard && !tx.isStandardInputs(flags)) {
@@ -516,7 +518,7 @@ Mempool.prototype.verify = function verify(tx, callback) {
         0));
     }
 
-    this.freeCount += tx.getVirtualSize();
+    this.freeCount += tx.getSize();
   }
 
   if (this.rejectInsaneFees && fee.cmp(minFee.muln(10000)) > 0)
@@ -543,16 +545,16 @@ Mempool.prototype.verify = function verify(tx, callback) {
           if (err)
             return callback(err);
 
-          if (!result) {
+          if (result) {
             return callback(new VerifyError(
               'nonstandard',
-              'mandatory-script-verify-flag',
+              'non-mandatory-script-verify-flag',
               0));
           }
 
           return callback(new VerifyError(
             'nonstandard',
-            'non-mandatory-script-verify-flag',
+            'mandatory-script-verify-flag',
             0));
         });
       }