diff --git a/lib/bcoin/tx.js b/lib/bcoin/tx.js
index a1523c80..2d77ca7e 100644
--- a/lib/bcoin/tx.js
+++ b/lib/bcoin/tx.js
@@ -42,8 +42,8 @@ function TX(data, block) {
   // ps = Pending Since
   this.ps = this.ts === 0 ? +new Date() / 1000 : 0;
 
-  this.m = data.m || 1;
-  this.n = data.n || 1;
+  this.m = data.m;
+  this.n = data.n;
   this.change = data.change || null;
   this.fee = data.fee || 10000;
   this.dust = 5460;
@@ -153,6 +153,7 @@ TX.prototype.scriptInput = function(input, pub, nsigs) {
   // Multisig
   // raw format: OP_FALSE [sig-1] [sig-2] ...
   if (bcoin.script.isMultisig(s)) {
+    nsigs = nsigs || this.m;
     if (!nsigs)
       throw new Error('`nsigs` is required for multisig');
     input.script = [ constants.opcodes['false'] ];