diff --git a/lib/bcoin/pool.js b/lib/bcoin/pool.js
index 56bafde3..8a8e2baa 100644
--- a/lib/bcoin/pool.js
+++ b/lib/bcoin/pool.js
@@ -348,17 +348,19 @@ Pool.prototype.watch = function watch(id) {
     return;
   }
 
-  var hid = utils.toHex(id);
-  if (this.watchMap[hid])
-    this.watchMap[hid]++;
-  else
-    this.watchMap[hid] = 1;
+  if (id) {
+    var hid = utils.toHex(id);
+    if (this.watchMap[hid])
+      this.watchMap[hid]++;
+    else
+      this.watchMap[hid] = 1;
 
-  if (this.bloom.test(id, 'hex'))
-    return;
+    if (this.bloom.test(id, 'hex'))
+      return;
 
-  if (id)
     this.bloom.add(id, 'hex');
+  }
+
   if (this.peers.load)
     this.peers.load.updateWatch();
   for (var i = 0; i < this.peers.block.length; i++)