diff --git a/lib/bcoin/script.js b/lib/bcoin/script.js
index 8d0cc901..8b9db1e7 100644
--- a/lib/bcoin/script.js
+++ b/lib/bcoin/script.js
@@ -2891,9 +2891,18 @@ Script.prototype.getCoinbaseHeight = function getCoinbaseHeight() {
  */
 
 Script.getCoinbaseHeight = function getCoinbaseHeight(code) {
+  var height;
+
   if (code.length === 0)
     return -1;
 
+  if (typeof code[0] === 'number') {
+    height = Script.getSmall(code[0]);
+    if (height == null)
+      return -1;
+    return height;
+  }
+
   if (!Buffer.isBuffer(code[0]))
     return -1;