diff --git a/lib/bitcoind.js b/lib/bitcoind.js
index a7e04cb2..1c52411d 100644
--- a/lib/bitcoind.js
+++ b/lib/bitcoind.js
@@ -306,6 +306,9 @@ Bitcoin.prototype._pollBlocks = function() {
 
         // XXX Bad workaround
         if (self._emitted[block.hash]) {
+          if (Object.keys(self._emitted[block.hash]).length > 10000) {
+            self._emitted = {};
+          }
           return setImmediate(function() {
             return nextBlock();
           });
@@ -353,6 +356,9 @@ Bitcoin.prototype._pollMempool = function() {
 
         // XXX Bad workaround
         if (self._emitted[tx.txid]) {
+          if (Object.keys(self._emitted[block.hash]).length > 10000) {
+            self._emitted = {};
+          }
           return setImmediate(function() {
             return nextTx();
           });