diff --git a/lib/bitcoind.js b/lib/bitcoind.js
index c0a6f5a5..15d7ce82 100644
--- a/lib/bitcoind.js
+++ b/lib/bitcoind.js
@@ -421,6 +421,7 @@ Bitcoin.prototype.getAddrTransactions = function(addr, callback) {
     Bitcoin._collectAddrGarbage = setInterval(function() {
       Bitcoin._addrCache = {};
     }, 20 * 60 * 1000);
+    Bitcoin._collectAddrGarbage.unref();
   }
   var cached = Bitcoin._addrCache[addr];
   if (cached && Date.now() <= (cached.time + 10 * 60 * 1000)) {