diff --git a/lib/mining/template.js b/lib/mining/template.js
index 03e0d631..a082a501 100644
--- a/lib/mining/template.js
+++ b/lib/mining/template.js
@@ -288,22 +288,22 @@ BlockTemplate.prototype.createCoinbase = function createCoinbase(hash) {
   // Reserved size.
   // Without segwit:
   //   CB weight = 504
-  //   CB stripped size = 125
-  //   CB size = 125
+  //   CB stripped size = 126
+  //   CB size = 126
   //   Sigops cost = 4
   // With segwit:
   //   CB weight = 728
-  //   CB stripped size = 172
-  //   CB size = 208
+  //   CB stripped size = 173
+  //   CB size = 209
   //   Sigops cost = 4
   if (!this.witness) {
     assert.strictEqual(cb.getWeight() + padding * scale, 504);
-    assert.strictEqual(cb.getBaseSize() + padding, 125);
-    assert.strictEqual(cb.getSize() + padding, 125);
+    assert.strictEqual(cb.getBaseSize() + padding, 126);
+    assert.strictEqual(cb.getSize() + padding, 126);
   } else {
     assert.strictEqual(cb.getWeight() + padding * scale, 728);
-    assert.strictEqual(cb.getBaseSize() + padding, 172);
-    assert.strictEqual(cb.getSize() + padding, 208);
+    assert.strictEqual(cb.getBaseSize() + padding, 173);
+    assert.strictEqual(cb.getSize() + padding, 209);
   }
 
   // Setup coinbase flags (variable size).